Title: USDA Farmers' Bulletin No. 630 - Some Common Birds Useful to the Farmer
Author: Beal, F. E. L. (Foster Ellenborough Lascelles)
Language: English
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                     U. S. DEPARTMENT OF AGRICULTURE

                        FARMERS BULLETIN No. 630



                               SOME COMMON

                              BIRDS USEFUL

                                 to the

                                 FARMER


FROM a purely practical point of view the most important of the relations
of native birds to man are the economic. The esthetic value of birds is
great--greater, indeed, than that of any other group of animals; and that
this is a real and especially treasured value is not to be denied. But it
is in their relation to insect and other enemies of crops that birds are
most directly associated with the welfare of mankind, and their value in
this particular should be made as widely known as possible.

This bulletin is one of a series designed to assist in doing this. Not
all birds are beneficial, and all facts tending to show in which class
each species belongs will be set forth. The useful kinds far outnumber
the injurious, however, and so great is their value as insect destroyers
in the United States that to them may be given the credit of being one of
the greatest controlling factors in limiting the development of insect
pests and in preventing many disastrous outbreaks.

In the following pages are discussed the habitat, food habits, and
relation to agriculture of more than 50 species of birds common to
farming sections.


Washington, D. C.

Issued February 13, 1915; revised April, 1926



SOME COMMON BIRDS USEFUL TO THE FARMER.[1]


By F. E. L. Beal, Late _Assistant Biologist, Division of Food Habits
Research, Bureau of Biological Survey_.

[1] This bulletin is largely a revision of Farmers' Bulletin 54, by
Prof. F. E. L. Beal. The parts relating to the crow and blue Jay were
contributed by E. R. Kalmbach, assistant biologist, and the discussion
of the nighthawk and bobwhite by W. L. McAtee, in charge. Food Habits
Research. Professor Beal, author of the remainder of the bulletin, died
October 1, 1916.



CONTENTS


                           Page.                                Page.
  The bluebirds               2        Bullock oriole             14
  The robins                  3        The meadowlarks            14
  The titmice                 4        The red-winged blackbirds  15
  The wrens                   6        Bobolink                   17
  Brown thrasher              7        Crow                       17
  Catbird                     7        Blue jay                   19
  The swallows                8        Pacific coast jays         20
  Towhee                      9        The phœbes                 21
  The sparrows                9        The kingbirds              23
  House finch                11        Nighthawk                  24
  The grackles               12        The woodpeckers            25
  Brewer blackbird           12        The cuckoos                27
  Baltimore oriole           13        Bobwhite                   28

WHETHER a bird is beneficial or injurious depends almost entirely upon
what it eats. In the case of species which are very abundant, or which
feed to some extent on the crops of the farmer, the question of their
average diet becomes one of supreme importance, and only by stomach
examinations can it be satisfactorily answered. Field observations are
at best but fragmentary and inconclusive and lead to no final results.
Birds are often accused of eating this or that product of cultivation,
when an examination of the stomachs shows the accusation to be unfounded.
Accordingly, the Biological Survey has conducted for some years a
systematic investigation of the food of those species which are most
common about the farm and garden.

Within certain limits birds eat the kind of food that is most accessible,
especially when their natural food is scarce or wanting. Thus they
sometimes injure the crops of the farmer who has unintentionally
destroyed their natural food in his improvement of swamp or pasture.
Most of the damage done by birds and complained of by farmers and
fruit growers arises from this very cause, the berry-producing shrubs
and seed-bearing weeds have been cleared away, and the birds have no
recourse but to attack the cultivated grain or fruit which has replaced
their natural food supply. The great majority of land birds subsist upon
insects during the period of nesting and molting, and also feed their
young upon them during the first few weeks. Many species live almost
entirely upon insects, taking vegetable food only when other subsistence
fails. It is thus evident that in the course of a year birds destroy an
incalculable number of insects, and it is difficult to overestimate the
value of their services in restraining the great tide of insect life.

In winter, in the northern part of the country, insects become scarce or
entirely disappear. Many species of birds, however, remain during the
cold season and are able to maintain life by eating vegetable food, as
the seeds of weeds. Here again is another useful function of birds in
destroying these weed seeds and thereby lessening the growth of the next
year.

In the following pages are discussed the food habits of more than
50 birds belonging to 12 families. Many are eastern forms which are
represented in the West by slightly different species or subspecies, but
unless the food habits differ they are not separately described. In some
cases specific percentages of food are given, but for the most part the
statements are made without direct reference to the data on which they
are based.



THE BLUEBIRDS.


The eastern bluebird[2] (fig. 1), one of the most familiar and welcome
of our feathered visitors, is a common inhabitant of all the States east
of the Rocky Mountains from the Gulf of Mexico to southern Canada. In
the Mississippi valley it winters as far north as southern Illinois, and
in the East as far as Pennsylvania. It is one of the earliest northern
migrants, and everywhere is hailed as a harbinger of spring. Very
domestic in habits, it frequents orchards and gardens, and builds its
nests in cavities of trees, crannies in farm buildings, or boxes provided
for its use.

[2] _Sialia sialis_.

[Illustration: Fig. 1.--Bluebird. Length, about 6½ inches.]

The bluebird has not been accused, so far as known, of stealing fruit or
of preying upon crops. An examination of 855 stomachs showed that 68 per
cent of the food consists of insects and their allies, while the other
32 per cent is made up of various vegetable substances, found mostly in
stomachs taken in winter. Beetles constitute 21 per cent of the whole
food, grasshoppers 22, caterpillars 10, and various other insects 9,
while a number of spiders and myriapods, about 6 per cent, comprise
the remainder of the animal diet. All these are more or less harmful,
except a few predacious beetles, which amount to 9 per cent. In view
of the large consumption of grasshoppers and caterpillars, we may at
least condone this offense, if such it may be called. The destruction
of grasshoppers is very noticeable in August and September, when these
insects make up about 53 per cent of the diet.

It is evident that in the selection of its food the bluebird is governed
more by abundance than by choice. Predacious beetles are eaten in spring,
as they are among the first insects to appear; but in early summer
caterpillars form an important part of the diet, and these are later
replaced by grasshoppers. Beetles are eaten at all times, except when
grasshoppers are more easily obtained.

So far as its vegetable food is concerned the bluebird is positively
harmless. The only trace of any useful product in the stomachs consisted
of a few blackberry seeds, and even these probably belonged to wild
rather than cultivated varieties. Following is a list of the various
seeds which were found; Blackberry, chokeberry, juniperberry, pokeberry,
partridgeberry, greenbrier, Virginia creeper, bittersweet, holly,
strawberry bush, false spikenard, wild sarsaparilla, sumac (several
species), rose haws, sorrel, ragweed, grass, and asparagus. This list
shows how little the bluebird depends upon the farm or garden to supply
its needs and how easily, by encouraging the growth of some of these
plants, many of which are highly ornamental, the bird may be induced to
make its home on the premises.

Two species of bluebirds inhabit the Western States--the mountain
bluebird[3] and the western bluebird.[4] In their food habits they are
even more to be commended than their eastern relative. Their insect food
is obtainable at all times of the year, and the general diet varies only
in the fall, when some fruit, principally elderberries, is eaten, though
an occasional blackberry or grape is also relished. In an examination of
217 stomachs of the western bluebird, animal matter (insects and spiders)
was found to the extent of 82 per cent and vegetable matter to the extent
of 18 per cent. The bulk of the former consists of bugs, grasshoppers,
and caterpillars. Grasshoppers, when they can be obtained, are eaten
freely during the whole season. Caterpillars also are a favorite food
and are eaten during every month of the year; March is the month of
greatest consumption, with 50 per cent, and the average for the year is
20 per cent. Two stomachs taken in January contained 64 and 50 per cent,
respectively, of caterpillars. Beetles also are eaten and comprise mostly
harmful species.

[3] _Sialia currucoides_.

[4] _Sialia mexicana_ subspecies.

The vegetable matter consists of weed seeds and small fruits. In December
a few grapes are eaten, but elderberries are the favorites whenever they
can be found. It is only when these are in their greatest abundance that
vegetable exceeds animal food.



THE ROBINS.


[Illustration: Fig. 2.--Robin. Length, about 10 inches.]

The robin[5] (fig. 2), in many parts of the country one of the most
cherished of our birds, is found throughout the States east of the Great
Plains, and is represented farther west and south by slightly different
subspecies.[6], [7] It breeds far north through Canada, and is found even
in Alaska. Although the great bulk of the species leaves the Northern
States in winter, a few individuals remain in sheltered swamps, where
wild berries furnish abundant food. The robin is an omnivorous feeder
and its food habits have sometimes caused apprehension to the fruit
grower, for it is fond of cherries and other small fruits, particularly
the earlier varieties. For this reason many complaints have been lodged
against robins, and it has been necessary to permit the killing of the
birds in some fruit-growing regions.

[5] _Planesticus migratorius_.

[6] _Planesticus migratorius propinquus_.

[7] _Planesticus migratorius achrusterus_.

Examinations of 1,236 stomachs show that 42 per cent of its food is
animal matter, principally insects, while the remainder is made up
largely of small fruits or berries. Over 16 per cent consists of beetles,
about one-third of which are useful ground beetles, taken mostly in
spring and fall when other insects are scarce. Grasshoppers make up about
5 per cent of the whole food, but in August they comprise 17 per cent.
Caterpillars form about 9 per cent, while the rest of the animal food,
about 11 per cent, is made up of various insects, with a few spiders,
snails, and angleworms. All the grasshoppers, caterpillars, and bugs,
with a large portion of the beetles, are injurious, and it is safe to say
that noxious insects comprise more than one-third of the robin's food.

Vegetable food forms 58 per cent of the stomach contents, over 42 per
cent being wild fruits and only a little more than 8 per cent being
possibly cultivated varieties. Cultivated fruit amounting to about 25 per
cent was found in the stomachs in June and July, but only a trifle in
August. Wild fruit, on the contrary, is eaten every month and constitutes
a staple food during half the year. No less than 65 species of fruit were
identified in the stomachs; of these, the most important were 4 species
of dogwood, 3 of wild cherries, 3 of wild grapes, 4 of greenbrier, 2
of holly, 2 of elder; and cranberries, huckleberries, blueberries,
barberries, service berries, hackberries, and persimmons; together with 4
species of sumac and various other seeds not strictly fruit.

The depredations of the robin seem to be confined to the smaller and
earlier fruits, few, if any, complaints being made that it eats apples,
peaches, pears, grapes, or even late cherries. By the time these are
ripe the forests and hedges are teeming with wild fruits which the bird
evidently finds more to its taste. The cherry, unfortunately for man,
ripens so early that it is almost the only fruit accessible at a time
when the bird's appetite has been sharpened by a long-continued diet of
insects, earthworms, and dried berries, and it is no wonder that at first
the rich juicy morsels are greedily eaten.

While the robin takes some cultivated fruits, it must be remembered that,
being a natural enemy of the insect world, it has been working during the
whole season to make that crop a possibility, and when the fruit ripens
the robin already has a standing account with the farmer for services
rendered, with the credits up to this time entirely on his side.

Much has been written about the delicate discrimination of birds for
choice fruit and their selection of only the finest and costliest
varieties. This is contrary to observed facts. Birds, unlike human
beings, seem to prefer fruit that, like the mulberry, is sweetly insipid,
or that, like the chokecherry or holly, has some astringent or bitter
quality. The so-called black alder, a species of holly, has bright
scarlet berries tasting as bitter as quinine, that ripen late in October
and remain on the bushes through November. Though frost grapes, the fruit
of the Virginia creeper, and several species of dogwood are abundant at
the same time, the birds have been found to eat the berries of the holly
to a considerable extent. It is, moreover, a remarkable fact that the
wild fruits upon which birds largely feed are those which man neither
gathers for his own use nor adopts for cultivation.

Where wild fruit is not abundant, a few fruit-bearing shrubs and vines
judiciously planted will serve for ornament and provide food for the
birds. The Russian mulberry is a vigorous grower and a profuse bearer,
ripening at the same time as the cherry. So far as observation has gone,
most birds seem to prefer its fruit to any other. It is believed that a
number of mulberry trees planted around the garden or orchard would fully
protect the more valuable fruits.



THE TITMICE.


Birds of the titmouse family, though insignificant in size, are far from
being so in the matter of food habits. What they lack in size of body
they more than make up in numbers of individuals. While in the case of
some larger birds, as, for instance, the flicker, there is one pair of
eyes to look for food for one large stomach, we have in the case of the
ten times as numerous titmice an equivalent stomach capacity divided into
10 parts, each furnished with a pair of eyes and other accessories, as
wings and feet. As against the one place occupied by the larger bird, 10
are being searched for food at the same time by the smaller species.

The character of the food of titmice gives a peculiar value to their
services, for it consists largely of the small insects and their eggs
that wholly escape the search of larger birds. Throughout the year most
of the species of this group remain on their range, so that they are
constantly engaged in their beneficial work, continuing it in winter when
the majority of their coworkers have sought a milder clime. It is at
this season that the titmice do their greatest good, for when flying and
crawling insects are no more to be found, the birds must feed upon such
species as they find hibernating in crevices, or upon the eggs of insects
laid in similar places. In winter's dearth of moving insects the search
for such animal food as may be found is perforce thorough and unremitting.

Within the boundaries of the United States are some 17 species of
titmice, with nearly as many races or subspecies, so that there is
no portion of the country lacking one or more forms. The western
coast region is peculiarly rich In representatives of the family. In
the eastern portion of the country the best-known and most widely
distributed species is the common black-capped chickadee[8] (fig. 3).
This bird, or some of its subspecies, occupies the whole of that part of
the United States north of the latitude of Washington and extends into
Canada. It is a prolific breeder, usually rearing from six to eight young
in a brood.

[8] _Penthestes atricapillus_.

[Illustration: Fig. 3.--Black-capped chickadee. Length, about 5¼
inches.]

Examination of 289 stomachs of this chickadee shows that its food
consists of 68 per cent animal matter (insects) and 32 per cent vegetable
matter. The former is made up of small caterpillars and moths and their
eggs. Prominent among the latter are the eggs of the tent caterpillar
moths, both the orchard and forest species. As these are two of our most
destructive insects, the good done by the chickadee in devouring their
eggs needs no comment. During the winter the chickadee's food is made
up of larvæ, chrysalids, and eggs of moths, varied by a few seeds, but
as spring brings out hordes of flying, crawling, and jumping insects,
the bird varies its diet by taking also some of these. Flies and bugs
are the favorites until the weather becomes quite warm, when beetles and
small wasps also are enjoyed. Among the bugs may be mentioned the plant
lice and their eggs which are eaten in winter. The beetles nearly all
belong to the group of snout beetles, more commonly known as weevils.
These insects are mostly of small size, and nearly all are known to the
farmer or fruit raiser as pests. Seventeen of them were found in one
stomach. Grasshoppers do not at any time constitute an important element
of the food of the chickadee, as they are too large for so small a bird;
moreover, they are for the most part terrestrial Insects, while the bird
is essentially arboreal. Small wasps and ants are eaten to some extent
Spiders constitute an Important element of the food and are eaten at all
times of the year, the birds locating them when they are hibernating in
winter, as well as when they are active in summer. The vegetable food of
the chickadee consists largely of small seeds, except in summer, when
they are replaced by pulp of wild fruit. The wax from the seeds of poison
ivy Is eaten during the winter months, but the seeds themselves are not
taken. In this respect the chickadee differs from most other birds, which
swallow the seeds whole; these, after digesting the wax, pass the seeds
through the alimentary canal, or regurgitate them, and so scatter them
broadcast to reproduce the noxious plants.

In the southern part of the country the Carolina chickadee[9] and the
tufted tit[10] replace the black-cap, but their food habits are so
similar that there is practically no difference in the work done. In the
West several other species occur; one of the most interesting is the
bush tit[11] which, with several subspecies, occupies the whole Pacific
coast region. They are active, social little creatures, and except for a
short time during the breeding season are found in flocks, flitting from
tree to tree, busily hunting for Insects and their eggs. The contents
of 66 stomachs of these birds were found to consist mostly of injurious
insects to the extent of 83 per cent. Of these the most important was a
small hemipterous insect which amounted to more than half of the stomach
contents. These insects are of considerable economic importance, as they
frequently infest grapevines and other plants to a harmful extent Several
stomachs were almost exclusively filled with these minute creatures, some
containing as many as 100 individuals.

[9] _Penthestes carolinensis_.

[10] _Bæolophus bicolor_.

[11] _Psaltriparus minimus_.

Perhaps the most important and interesting insect found was the black
olive scale, which occurred in 24 stomachs and amounted to a little more
than 18 per cent of the food. In addition, a number of the stomachs were
more or less filled with another scale, which was not further identified.
A number of small snout beetles (weevils) were eaten and some small
caterpillars; there were also the remains of a spider.

The vegetable food of the species seemed to consist mostly of seeds, but
they were so broken up as to defy recognition. A little fruit pulp and a
little mast were also found.

Among the stomachs of the bush tits examined were those of one brood
of eight nestlings about 10 days old. The vegetable matter in these
stomachs was only three-fourths of 1 per cent and consisted of one seed
and some rubbish. The animal matter was made up of beetles, wasps, bugs,
caterpillars and pupæ, and spiders. The greatest interest lies in the
fact that every one of these stomachs contained pupæ of the codling
moth, on an average of over five to each. The oak tree in which these
birds were found was in a belt of timber near a neglected orchard which
the parent birds used as a foraging ground, and they did their best to
remedy the neglect of the owner. As feeding and digestion in the case of
nestling birds is almost continuous during the hours of daylight, the
above record would be several times repeated during a day's feeding.
There were probably not less than a dozen nests of the bush tit along
the border of this orchard, and these birds must have exerted a great
restrictive influence upon the increase of the codling moth, as well as
of other insects in that vicinity.



THE WRENS.


[Illustration: Fig. 4.--House wren. Length, about 4¾ inches.]

The diminutive house wren[12] (fig. 4) frequents barns and gardens, and
particularly old orchards in which the trees are partially decayed. He
makes his nest in a hollow where perhaps a woodpecker had a domicile the
year before, but he is a pugnacious character, and if he happens to fancy
one of the boxes put up for bluebirds, he does not hesitate to take it He
is usually not slow to avail himself of boxes, gourds, tin cans, or empty
jars placed for his accommodation.

[12] _Troglodytes aëdon_.

In food habits the house wren is entirely beneficial. He may be said to
live upon animal food alone, for an examination of 88 stomachs showed
that 98 per cent of the contents was made up of insects or their allies,
and only 2 per cent was vegetable food, including bits of grass and
similar matter, evidently taken by accident with the insects. Half
of this food consisted of grasshoppers and beetles; the remainder of
caterpillars, bugs, and spiders. As the wren is a prolific breeder,
frequently rearing in a season from 12 to 16 young, a family of these
birds must cause considerable reduction in the number of insects in a
garden. Wrens are industrious foragers, searching every tree, shrub, and
vine for caterpillars, and examining every post and rail of the fence and
every cranny in the wall for insects or spiders.

The house wren is only one of a numerous group of small birds of similar
habits. There are within the limits of the United States 28 species
and subspecies of wrens, occupying more or less completely the whole
country from the Atlantic to the Pacific. With the exception of the marsh
wrens,[13] they all appear to prefer some cosy nook for a nesting site,
and, as it happens, the farm buildings afford just the place desired.
This has led several of the wrens to seek out the habitations of man,
and he is benefited by their destruction of noxious insects. Wrens have
rarely been accused of harm, and their presence should be encouraged
except when undue interference with the nests of other birds is noted.

[13] _Telmatodytes palustris_ and _Cistotherus stellaris_.



BROWN THRASHER.


The brown thrasher[14] (fig. 5) breeds throughout the United States
east of the Great Plains, and winters in the South Atlantic and Gulf
States. It visits the garden or orchard, its nest, however, being in
dense shrubbery or groves. The thrasher's favorite time for singing is
in early morning, when, perched on the top of a bush or tree, it gives
an exhibition of vocal powers which would do credit to the mockingbird.
Indeed, in the South, where the latter bird is abundant, the thrasher is
known as the sandy mocker.

[14] _Toxostoma rufum_.

[Illustration: Fig. 5.--Brown thrasher. Length, about 11 inches.]

The food of the brown thrasher consists of both fruit and insects. An
examination of 636 stomachs showed 59 per cent of vegetable and 41 per
cent of animal food, practically all insects, and mostly taken in spring
before fruit was ripe. Half the insects were beetles and the remainder
chiefly grasshoppers, caterpillars, bugs, and spiders. A few predacious
beetles were eaten, but on the whole the work of the species as an insect
destroyer may be considered beneficial.

Eight per cent of its food is made up of fruits like raspberries and
currants which are or may be cultivated, but the raspberries at least
are as likely to belong to wild as to cultivated varieties. Grain, made
up mostly of scattered kernels of oats and corn, is merely a trifle,
amounting to only 3 per cent. Though some of the corn may be taken from
newly planted fields, it is amply paid for by the destruction of May
beetles which are eaten at the same time. The rest of the food consists
of wild fruit or seeds. Taken all in all, the brown thrasher is a useful
bird, and probably does as good work in its secluded retreats as it would
about the garden, for the swamps and groves are no doubt the breeding
grounds of many insects that migrate thence to attack the crops of the
farmer.



CATBIRD.


[Illustration: Fig. 6.--Catbird. Length, about 9 inches.]

The catbird[15] (fig. 6), like the thrasher, is a lover of thickets and
delights to make its home in a tangle of wild grapevines, greenbriers,
and shrubs, where it is safe from attack and can find its favorite food
in abundance. It is found throughout the United States west to the Rocky
Mountains, and extends also from Washington, Idaho, and Utah northward
into the Provinces of Canada. It winters in the Southern States, Cuba,
Mexico, and Central America.

[15] _Dumetella carolinensis_.

Reports from the Mississippi Valley indicate that the catbird is
sometimes a serious annoyance to fruit growers. The reason for such
reports may possibly be found in the fact that on the prairies
fruit-bearing shrubs, which afford so large a part of this bird's food,
are conspicuously absent With the settlement of this region comes an
extensive planting of orchards, vineyards, and small-fruit gardens, which
furnish shelter and nesting sites for the catbird as well as for other
species. There is in consequence a large increase in the numbers of the
birds, but no corresponding gain in the supply of native fruits upon
which they were accustomed to feed. Under these circumstances what is
more natural than for the birds to turn to cultivated fruit for their
food. The remedy is obvious: Cultivated fruits can be protected by the
simple expedient of planting the wild species which are preferred by the
birds. Some experiments with catbirds in captivity show that the Russian
mulberry is preferred to any cultivated fruit.

The stomachs of 645 catbirds were examined and found to contain 44 per
cent of animal (insect) and 56 per cent of vegetable food. Ants, beetles,
caterpillars, and grasshoppers constitute three-fourths of the animal
food, the remainder being made up of bugs, miscellaneous insects, and
spiders. One-third of the vegetable food consists of cultivated fruits,
or those which may be cultivated, as strawberries, raspberries, and
blackberries; but while we debit the bird with the whole of this, it is
probable--and in the eastern and well-wooded part of the country almost
certain--that a large part is obtained from wild vines. The rest of the
vegetable matter is mostly wild fruit, as cherries, dogwood, sour gum,
elderberries, greenbrier, spiceberries, black alder, sumac, and poison
ivy. Although the catbird sometimes does considerable harm by destroying
small fruit, it can not on the whole be considered injurious. On the
contrary, in most parts of the country it does far more good than harm.



THE SWALLOWS.


Seven common species of swallows are found within the limits of the
United States, four of which have abandoned to some extent their
primitive nesting habits and have attached themselves to the abodes of
man.

[Illustration: Fig. 7.--Barn swallow. Length, about 7 inches.]

In the eastern part of the country the barn swallow[16] (fig. 7) now
builds exclusively under roofs, having entirely abandoned the rock
caves and cliffs in which it formerly nested. More recently the cliff
swallow[17] has found a better nesting site under the eaves of buildings
than was afforded by the overhanging cliffs of earth or stone which it
once used and to which it still resorts occasionally in the East and
habitually in the unsettled West. The martin[18] and the white-bellied,
or tree, swallow[19] nest either in houses supplied for the purpose, in
abandoned nests of woodpeckers, or in natural crannies in rocks. The
northern violet-green swallow,[20] the rough-winged swallow,[21] and the
bank swallow[22] still live in practically such places as their ancestors
chose.

[16] _Hirundo erythrogastra_.

[17] _Petrochelidon lunifrons_.

[18] _Progne subis_.

[19] _Iridoprocne bicolor_.

[20] _Tachycineta thalassina_.

[21] _Stelgidopteryx serripennis_.

[22] _Riparia riparia_.

Field observation convinces an ordinarily attentive person that the food
of swallows must consist of the smaller insects captured in mid-air or
picked from the tops of tall grass or weeds. This observation is borne
out by an examination of stomachs, which shows that the food is made up
of many small species of beetles which are much on the wing; many species
of flies, together with large quantities of flying ants; and a few
insects of similar kinds. Most of these are either injurious or annoying,
and the numbers destroyed by swallows are not only beyond calculation but
almost beyond imagination.

Unlike many other groups of birds, the six species of swallows found in
the Eastern States extend in a practically unchanged form across the
continent, where they are reinforced by the northern, or Pacific-coast,
violet-green swallow.

It is a mistake to tear down from the eaves of a barn the nests of a
colony of cliff swallows, for so far from disfiguring a building they
make a picturesque addition to it, and the presence of swallows should
be encouraged by every device. It is said that cliff and barn swallows
may be induced to build their nests in a particular locality, otherwise
suitable, by providing a quantity of mud to be used by them as mortar.
Barn swallows may also be encouraged by cutting a small hole in the gable
of the barn, while martins and white-bellied swallows will be grateful
for boxes like those for the bluebird, but placed in a higher situation.



TOWHEE.


[Illustration: Fig. 8.--Towhee. Length, about 8 inches.]

The towhee, chewink, or ground robin[23] (fig. 8), as it is variously
known, inhabits nearly the whole of the United States east of the Great
Plains. It breeds from the Middle States northward and winters in the
southern half of the country. Naturally associated with the catbird and
brown thrasher, it lives in much the same places, though it is more given
to haunting hedgerows along roads and fences. After snow has disappeared
in early spring an investigation of the rustling so often heard among the
leaves near a fence or in a thicket will frequently disclose a towhee
hard at work scratching for his dinner after the manner of a hen; and
in these places and along the sunny border of woods old leaves will
be found overturned where the bird has been searching for hibernating
beetles and larvæ. The good which the towhee does in this way can hardly
be overestimated, since the death of a single insect at this time,
before it has had an opportunity to deposit its eggs, is equivalent to
the destruction of a host later in the year. The towhee has also been
credited with visiting potato fields and feeding upon the potato beetle.
Its vegetable food consists of seeds and small wild fruits, but no
complaint on this score is known to have been made. So for as observation
goes, the bird never touches either cultivated fruit or grain; in fact,
it is too shy and retiring even to stay about gardens for any length of
time.

[23] _Pipilo erythrophthalmus_.



THE SPARROWS.[24]

[24] The sparrows here mentioned are all native species. A full account
of the English, or house, sparrow (_Passer domesticus_), including its
introduction, habits, and depredations, was published In Bull. No. 1
of the Division of Ornithology in 1889. For information in regard to
combating the English sparrow, see U. S. Department of Agriculture
Leaflet 61, English Sparrow Control.



Sparrows are not obtrusive birds, either in plumage, song, or action.
There are some 40 species, with nearly as many subspecies, in North
America. Not more than half a dozen forms are generally known in any one
locality. All the species are more or less migratory, but so widely are
they distributed that there is probably no part of the country where some
can not be found throughout the year.

While sparrows are noted seed eaters, they do not by any means confine
themselves to a vegetable diet. During the summer, and especially in
the breeding season, they eat many insects and feed their young largely
upon the same food. Examination of stomachs of three species--the song
sparrow[25] (fig. 9), chipping sparrow,[26] and field sparrow[27]
(fig. 10)--shows that about one-third of the food consists of insects,
comprising many injurious beetles, as snout beetles or weevils, and
leaf beetles. Many grasshoppers are eaten. In the case of the chipping
sparrow these insects form one-eighth of the food. Grasshoppers would
seem to be rather large morsels, but the bird probably confines itself to
the smaller species; indeed, the greatest amount (over 36 per cent) is
eaten in June, when the larger species are still young and the smaller
most numerous. Besides the insects already mentioned, many wasps and
bugs are taken. Predacious and parasitic hymenopterous insects and
predacious beetles, all useful, are eaten only to a slight extent, so
that as a whole the insect diet of the native sparrows may be considered
beneficial. There are several records of potato-bug larvæ eaten by
chipping sparrows.

[25] _Melospiza melodia_.

[26] _Spizella passerina_.

[27] _Spizella pusilla_.

Their vegetable food is limited almost exclusively to hard seeds. This
might seem to indicate that the birds feed to some extent upon grain, but
the stomachs examined show only one kind, oats, and but little of that.
The great bulk of the food is made up of grass and weed seeds, which form
almost the entire diet during winter, and the amount consumed is immense.

[Illustration: Fig. 9.--Song sparrow. Length, about 6½ inches.]

In the agricultural region of the upper Mississippi Valley, by roadsides,
on borders of cultivated fields, or in abandoned fields, wherever they
can obtain a foothold, masses of rank weeds spring up and often form
almost impenetrable thickets which afford food and shelter for immense
numbers of birds and enable them to withstand great cold and the most
terrible blizzards. A person visiting one of these weed patches on a
sunny morning in January, when the thermometer is 20° or more below
zero, will be struck with the life and animation of the busy little
inhabitants. Instead of sitting forlorn and half frozen, they may be
seen flitting from branch to branch, twittering and fluttering, and
showing every evidence of enjoyment and perfect comfort. If one of them
is captured it will be found in excellent condition; in fact, a veritable
ball of fat.

[Illustration: Fig. 10.--Field sparrow. Length, about 5½ inches.]

The snowbird[28] and tree sparrow[29] are perhaps the most numerous of
all the sparrows. Examination of many stomachs shows that in winter the
tree sparrow feeds entirely upon seeds of weeds. Probably each bird
consumes about one-fourth of an ounce a day. In an article contributed in
1881 to the New York Tribune the writer estimated the amount of weed seed
annually destroyed by these birds in Iowa. On the basis of one-fourth
of an ounce of seed eaten daily by each bird, and an average of 10 birds
to each square mile, remaining in their winter range 200 days, there
would be a total of 1,750,000 pounds, or 875 tons of weed seed consumed
in a single season by this one species. Large as are these figures, they
unquestionably fall far short of the reality. The estimate of 10 birds
to a square mile is very conservative, for in Massachusetts, where the
food supply is less than in the Western States, the tree sparrow is even
more abundant than this in winter. The writer has known places in Iowa
where several thousand tree sparrows could be seen within the space of a
few acres. This estimate, moreover, is for a single species, while, as a
matter of fact, there are at least half a dozen birds (not all sparrows)
that habitually feed during winter on these seeds. Farther south the
tree sparrow is replaced in winter by the white-throated sparrow,[30]
the white-crowned sparrow,[31] the fox sparrow,[32] the song sparrow,
the field sparrow, and several others; so that all over the land a vast
number of these seed eaters are at work during the colder months reducing
next year's crop of worse than useless plants.

[28] _Junco hyemalis_.

[29] _Spizella monticola_.

[30] _Zonotrichia albicollis_.

[31] _Zonotrichia leucophrys_.

[32] _Passerella iliaca_.



HOUSE FINCH


Of all the sparrow groups, there is probably no member, unless it be
the exotic form known as the English sparrow,[33] that has by reason
of Its food habits called down so many maledictions upon Its head as
the house finch,[34] red head, or linnet, as it is variously called.
This bird, like the other members of its family, is by nature a seed
eater, and before the beginning of fruit raising in California probably
subsisted upon the seeds of weeds, with an occasional taste of some wild
berry. Now, however, when orchards have extended throughout the length
and breadth of the State and every month from May to December sees
some ripening fruit, the linnets take their share. As their number Is
legion, the sum total of the fruit that they destroy is more than the
fruit raiser can well spare. As the bird has a stout beak, it has no
difficulty in breaking the skin of the hardest fruit and feasting upon
the pulp, thereby spoiling the fruit and giving weaker-billed birds a
chance to sample and acquire a taste for what they might not otherwise
have molested. Complaints against this bird have been many and loud, more
especially in the years when fruit crops first came to be an important
factor in the prosperity of the Pacific coast. At that time the various
fruits afforded the linnets a new and easily obtained food, while
cultivation had reduced their formerly abundant supply of weed seed.
When the early fruit growers saw their expected golden harvest suddenly
snatched away or at least much reduced in value by the little marauders,
it is no wonder that they were exasperated and wished to destroy the
authors of the mischief.

[33] _Passer domesticus_.

[34] _Carpodacus mexicanus frontalis_.

In order to test the matter thoroughly and ascertain whether these birds
ate any other kind of food that might to some extent offset the damage
inflicted upon the fruit, the horticulturists and ornithologists of
California were requested to secure a number of the stomachs of these
birds and send them to the Biological Survey. An agent was also sent to
the fruit-raising sections, who watched the birds in the orchards and
collected a number of them. In this way 1,206 stomachs were obtained
and carefully examined, and the result shows that animal food (insects)
constituted 2.44 per cent and vegetable food 97.56 per cent of the
stomach contents, not counting gravel.

So small a proportion of animal food can not, of course, mean a great
destruction of insects. As these stomachs were collected in every month,
with the greater number taken during the summer, it is evident that
whatever good one may expect from the linnet must not be looked for
in this direction. Unlike most of the sparrow family, the linnet does
not feed its young upon Insects to any great extent. The contents of
the stomachs of a number of nestlings were carefully examined, and the
only animal food was found to consist of wooly plant lice. These also
constituted the great bulk of the animal food eaten by adults.

The vegetable food of the species consists of three principal
items--grain, fruit, and weed seeds. Grain amounts to less than 1½
per cent in August, which is the month of greatest consumption, and the
average for the year is a trifle more than one-fourth of 1 per cent.
Fruit attains its maximum in September, when it amounts to 27 per cent
of the whole food, but the average for the year is only 10 per cent. The
seeds of weeds constitute the bulk of the diet of the linnet, and in
August, the month of least consumption, amount to about 64 per cent of
the food. The average for the year is 86 per cent.

From the foregoing it is evident that whatever the linnet's sins may
be, grain eating is not one of them. In view of the great complaint
made against its fruit-eating habits, the small quantity found in the
stomachs taken is somewhat of a surprise. But it must be remembered that
the stomach contents do not tell the whole story. When a bird takes a
single peck from a cherry or an apricot, it spoils the whole fruit, and
in this way may ruin half a dozen in taking a single meal. It is safe to
say that the fruit pulp found In the stomach does not represent more than
one-fifth of what is actually destroyed. That the linnets are persistent
and voracious eaters of early fruits, especially cherries and apricots,
every fruit raiser hi California will bear testimony. That the damage
is often serious no one will deny. It is noticeable, however, that the
earliest varieties are the ones most affected; also, that in large
orchards the damage is not perceptible, while in small plantations the
whole crop is frequently destroyed.



THE GRACKLES.


The crow blackbird or grackle[35] (fig. 11) in one or more of its
subspecies is a familiar object in all the States east of the Rocky
Mountains. Throughout the year it is resident as far north as southern
Illinois, and in summer extends its range into the Canadian Provinces.
In the Mississippi Valley it is one of the most abundant of birds,
preferring to nest in the artificial groves and windbreaks near farms
instead of in the natural "timber" which it formerly used. It breeds also
in parks and near buildings, often in considerable colonies. Farther
east, in New England, it is only locally abundant, though frequently seen
in migration. In the latter days of August and throughout September it is
found in immense numbers before moving southward.

[35] _Quiscalus quiscula_.

[Illustration: Fig. 11.--Purple grackle. Length, about 12 inches.]

The grackle is accused of many sins, such as stealing grain and fruit and
robbing the nests of other birds. An examination of 2,346 stomachs shows
that nearly one-third of its food consists of insects, most of which are
injurious. The bird also eats a few snails, crawfishes, salamanders,
small fish, and occasionally a mouse. The stomach contents do not
indicate that it robs other birds' nests to any great extent, as remains
of birds and birds' eggs amount to less than half of 1 per cent.

It is on account of its vegetable food that the grackle most deserves
condemnation. Grain is eaten during the whole year, and only for a short
time in summer is other food attractive enough to induce the bird to
alter its diet. The grain taken in winter and spring probably consists of
waste kernels from stubble. The stomachs do not indicate that the bird
pulls sprouting grain; but the wheat eaten in July and August and the
corn eaten in the fall are probably from fields of standing grain. The
total amount of grain consumed during the year constitutes 45 per cent
of the food, but it is safe to say that at least half is waste grain and
consequently of no value. Although the crow blackbird eats a few cherries
and blackberries in their season, and in the fall some wild fruit, it
apparently does no damage in this way.

Large flocks of grackles no doubt do considerable injury to grain crops,
and there seems to be no remedy, except the destruction of the birds,
which is in itself expensive. During the breeding season, however, the
species does much good by eating insects and by feeding them to its
young, which are reared almost entirely upon this food. The bird does the
greatest amount of good in spring, when it follows the plow in search of
large grubworms, of which it is so fond that it sometimes literally crams
its stomach full of them.



BREWER BLACKBIRD.


The Brewer blackbird[36] takes the place in the Western States of the
grackle, or crow blackbird, which lives in the Mississippi Valley and
farther east and is very similar in appearance and habits. It breeds east
to the Great Plains and north into Canada, and winters over most of its
breeding range in the United States and south to Guatemala. At home in
fields, meadows, and orchards, and about ranch buildings and cultivated
lands generally, it nests in bushes and weeds, sometimes in trees, and is
very gregarious, especially about barnyards and corrals. The bird feeds
freely in stockyards and in cultivated fields, and when fruit is ripe
does not hesitate to take a share During the cherry season in California
the birds are much in the orchards. In one case they were observed
feeding on cherries, but when a neighboring fruit grower began to plow
his orchard almost every blackbird in the vicinity was upon the newly
opened ground close after the plowman's heels in its eagerness to secure
the insects turned up.

[36] _Euphagus cyanocephalus_.

The laboratory investigation of this bird's food covered 312 stomachs,
collected in every month and representing especially the fruit and grain
sections of southern California. The animal portion of the food was 32
per cent and the vegetable 68 per cent.

Caterpillars and their pupæ amounted to 12 per cent of the whole food
and were eaten every month. They include many of those pests known as
cutworms. The cotton-boll worm, or corn-ear worm, was identified in at
least 10 stomachs, and in 11 were found pupæ of the codling moth. The
animal food also included other insects, and spiders, sow bugs, snails,
and eggshells.

The vegetable food may be divided into fruit, grain, and weed seeds.
Fruit was eaten in May, June, and July, not a trace appearing in any
other month, and was composed of cherries, or what was thought to be
such, strawberries, blackberries or raspberries, and fruit pulp or skins
not further identified. However, the amount, a little more than 4 per
cent for the year, was too small to make a bad showing, and if the bird
does no greater harm than is involved in its fruit eating it is well
worth protecting. Grain amounts to 54 per cent of the yearly food and
forms a considerable percentage in each month; oats are the favorite and
were the sole contents of 14 stomachs, and wheat of 2, but no stomach
was completely filled with any other grain. Weed seeds, eaten in every
month to the extent of 9 per cent of the food, were found in rather small
quantities and irregularly, and appear to have been merely a makeshift.

Stomachs of nestlings, varying in age from 24 hours to some that were
nearly fledged, were found to contain 89 per cent animal to 11 per cent
vegetable matter. The largest items in the former were caterpillars,
grasshoppers, and spiders. In the latter the largest items were fruit,
probably cherries; grain, mostly oats; and rubbish.



BALTIMORE ORIOLE.


[Illustration: Fig. 12.--Baltimore oriole. Length, about 7½ Inches.]

Brilliancy of plumage, sweetness of song, and food habits to which no
exception can be taken are some of the striking characteristics of the
Baltimore oriole[37] (fig. 12). In summer it is found throughout the
northern half of the United States east of the Great Plains. Its nest
commands hardly less admiration than the beauty of its plumage or the
excellence of its song. Hanging from the tip of the outermost bough of
a stately elm, it is almost inaccessible to depredators and so strongly
fastened as to bid defiance to the elements.

[37] _Icterus galbula_.

Observation both in the field and laboratory shows that caterpillars
constitute the largest item of the fare of the oriole. In 204 stomachs
they formed 34 per cent of the food, and they are eaten in varying
quantities during all the months in which the bird remains in this
country. The fewest are eaten in July, when a little fruit also is taken.
The other insects consist of beetles, bugs, ants, wasps, grasshoppers,
and some spiders. The beetles are principally click beetles, the larvæ of
which are among the most destructive insects known; and the bugs include
plant and bark lice, both very harmful, but so small and obscure as to
be passed over unnoticed by most birds. Ants are eaten mostly in spring,
grasshoppers in July and August, and wasps and spiders with considerable
regularity throughout the season.

During the stay of the oriole in the United States, vegetable matter
amounts to only a little more than 16 per cent of its food, so that the
possibility of its doing much damage to crops is very limited. The bird
is accused of eating peas to a considerable extent, but remains of such
were found in only two cases. One writer says that it damages grapes, but
none were found in the stomachs.



BULLOCK ORIOLE.


The Bullock oriole[38] is practically a counterpart of the Baltimore
oriole, taking the place of that species west of the Plains and
throughout the Pacific coast region. It does not essentially differ in
its habits of nesting or in its food from its eastern relative, but it
is less beautiful in plumage. The examination of 162 stomachs shows
that 79 per cent of its food consists of insects, with a few spiders, a
lizard, a mollusk shell, and eggshells. Beetles amounted to 35 per cent,
and all except a few ladybugs were harmful species. Ants were found in
19 stomachs, and in one there was nothing else. Bees, wasps, etc., were
in 56 stomachs, and entirely filled 2 of them. Including the ants, they
amount to nearly 15 per cent of the food of the season.

[38] _Icterus bullocki_.

One of the most interesting articles of food in the oriole's dietary was
the black olive scale, found in 45 stomachs, and amounting to 5 per cent
of the food. In several cases these scales formed 80 per cent or more of
the contents, and in one, 30 individual scales could be counted. They
were evidently a standard article of diet, and were eaten regularly in
every month of the oriole's stay except April. Hemipterous insects other
than scales, eaten quite regularly, make up a little more than 5 per cent
of the food. They were mostly stinkbugs, leaf hoppers, and tree hoppers.
Plant lice were found in one stomach.

Moths, pupæ, and caterpillars compose the largest item of the oriole's
animal food; the average consumption during its summer stay Is a little
more than 41 per cent. Of these, perhaps the most interesting were the
pupæ and larvæ of the codling moth. These were found in 23 stomachs,
showing that they are not an unusual article of diet. No less than 14 of
the pupal cases were found in one stomach, and as they are very fragile
many others may have been present, but broken beyond recognition.

Grasshoppers probably do not come much in the oriole's way. They were
eaten, however; to the extent of a little more than 3 per cent. But in
spite of the fact that grasshoppers are eaten so sparingly, 2 stomachs,
both taken in June, contained nothing else, and another contained 97 per
cent of them.

Various insects and spiders, with a few other items, make up the rest of
the animal food, a little more than 5 per cent. Spiders are not important
in the oriole's food, but are probably eaten whenever found. They were
identified in 44 stomachs, but in small numbers. The scales of a lizard
were found in one stomach and the shell of a snail in another.

The vegetable contingent of the oriole's food is mostly fruit, especially
in June and July, when it takes kindly to cherries and apricots, and
sometimes eats more than the fruit grower considers a fair share.
However, no great complaint is made against the bird, and it is probable
that as a rule it does not do serious harm. With such a good record as an
insect eater it can well be spared a few cherries.



THE MEADOWLARKS.


The eastern meadowlark[39] (fig. 13) is a common and well-known bird
occurring from the Atlantic coast to the Great Plains, where it gives
way to the closely related western species,[40] which extends thence
westward to the Pacific. It winters from our southern border as far north
as the District of Columbia, southern Illinois, and occasionally Iowa.
The western, form winters somewhat farther north. Although it is a bird
of the plains, and finds its most congenial haunts in the prairies of the
West, it is at home wherever there is level or undulating land covered
with grass or weeds, with plenty of water at hand.

[39] _Sturnella magna_.

[40] _Sturnella neglecta_.

In the 1,514 stomachs examined, animal food (practically all insects)
constituted 74 per cent of the contents and vegetable matter 26 per cent.
As would naturally be supposed, the insects were ground species, as
beetles, bugs, grasshoppers, and caterpillars, with a few flies, wasps,
and spiders. A number of the stomachs were collected when the ground
was covered with snow, but even these contained a large percentage of
insects, showing the bird's skill in finding proper food under adverse
circumstances.

Of the various insects eaten, crickets and grasshoppers are the most
important, constituting 26 per cent of the food of the year and 72 per
cent of the food in August. It is scarcely necessary to mention the
beneficial effect of a number of these birds on a field of grass in the
height of the grasshopper season. Of the 1,514 stomachs collected at
all seasons of the year, 778, or more than half, contained remains of
grasshoppers, and one was filled with fragments of 37 of these insects.
This seems to show conclusively that grasshoppers are preferred, and
are eaten whenever they can be found. Especially notable is the great
number taken in August, the month when grasshoppers reach their maximum
abundance; stomach examination shows that large numbers of birds resort
at this time to this diet, no matter what may be the food during the rest
of the year.

Next to grasshoppers, beetles make up the most important item of the
meadowlark's food, amounting to 25 per cent, about one-half of which are
predacious ground beetles. The others are all harmful species.

Forty-two individuals of different kinds of May beetles were found in
the stomachs of meadowlarks, and there were probably many more which
were past recognition. To this form and several closely allied ones
belong the numerous white grubs, which are among the worst enemies to
many cultivated crops, notably grasses and grains, and to a less extent
strawberries and garden vegetables. In the larval stage they eat the
roots of these plants, and being large, one individual may destroy
several plants. In the adult stage they feed upon the foliage of trees
and other plants, and in this way add to the damage which they began in
the earlier form. As these enemies of husbandry are not easily destroyed
by man, it is obviously wise to encourage their natural foes.

Among the weevils found in the stomachs the most important economically
are the cotton-boll weevil and the recently introduced alfalfa weevil
of Utah. Several hundred meadowlarks were taken in the cotton-growing
region, and the boll weevil was found in 25 stomachs of the eastern
meadowlark and in 16 of the western species. Of the former, one stomach
contained 27 individuals. Of 25 stomachs of western meadowlarks taken in
alfalfa fields of Utah, 15 contained the alfalfa weevil. In one stomach
23 adults were found, in another 32 adults and 70 larvæ, still another
had 10 adults and 40 larvæ, and a fourth had 4 adults and 100 larvæ.

[Illustration: Fig. 13.--Meadowlark. Length, about 10 inches.]

Caterpillars form a very constant element of the food, and in May
constitute over 24 per cent of the whole. May is the month when the
dreaded cutworm begins Its deadly career, and then the lark does some of
its best work. Most of these caterpillars are ground feeders, and are
overlooked by birds which habitually frequent trees, but the meadowlark
finds and devours them by thousands. The remainder of the insect food is
made up of ants, wasps, and spiders, with some bugs, including chinch
bugs, and a few scales.

The vegetable food consists of grain and weed and other hard seeds. Grain
in general amounts to 11 per cent and weed and other seeds to 7 per cent.
Grain, principally corn, is eaten mostly in winter and early spring
and consists, therefore, of waste kernels; only a trifle is consumed
in summer and autumn, when it is most plentiful. No trace of sprouting
grain was discovered. Glover seed was found in only six stomachs, and but
little in each. Seeds of weeds, principally ragweed, barnyard grass, and
smartweed, are eaten from November to April, inclusive, but during the
rest of the year are replaced by insects.

Briefly stated, more than half of the meadowlark's food consists of
harmful insects; its vegetable food is composed either of noxious weeds
or waste grain; and the remainder is made up of useful beetles or
neutral insects and spiders. A strong point in the bird's favor is that,
although naturally an insect eater, it is able to subsist on vegetable
food, and consequently is not forced to migrate in cold weather farther
than is necessary to find ground free from snow.

THE RED-WINGED BLACKBIRDS.

The red-winged or swamp blackbird[41] in its various forms (fig. 14) is
found all over the United States and the region immediately to the north.
While common in most of its range, its distribution is more or less
local, mainly on account of its partiality for marshes. It builds its
nest over or near standing water, in tall grass, rushes, or bushes. Owing
to this peculiarity the bird may be absent from large tracts of country
which afford no swamps or marshes suitable for nesting. It usually breeds
in large colonies, though single families, consisting of a male and
several females, may sometimes be found in a small slough, where each
female builds her nest and rears her own little brood. While her liege
lord displays his brilliant colors and struts in the sunshine. In the
upper Mississippi Valley the species finds most favorable conditions, for
the countless prairie sloughs and the margins of the numerous shallow
lakes afford nesting sites for thousands of red-wings; and here are bred
the immense flocks which sometimes do so much damage to the grain fields
of the West. After the breeding season the birds congregate preparatory
to migration, and remain thus associated throughout the winter.

[41] _Agelaius phœniceus_.

Three species and several subspecies of red-wings are recognized,[42]
but practically no difference exists in the habits of these forms either
in nesting or feeding, except such as may result from local conditions.
Most of the forms are found on the Pacific side of the continent, and
may be considered as included in the following statements as to food and
economic status.

[42] Agelaius phœniceus (8 forms), Agelaius gubernator, and Agelaius
tricolor.

Many complaints have been made against the red-wing, and several States
have at times placed a bounty upon its head. It is said to cause great
damage to grain in the West, especially in the upper Mississippi Valley,
but few complaints come from the northeastern section, where the bird is
much less abundant than in the West and South.

[Illustration: Fig. 14.--Red-winged blackbird. Length, about 9½
Inches.]

Examination of 1,083 stomachs showed that vegetable matter forms 74 per
cent of the food, while animal matter, mainly Insects, forms but 26 per
cent A little more than 10 per cent consists of beetles, mostly harmful
species. Weevils, or snout beetles, amount to 4 per cent of the year's
food, but in June reach 25 per cent. As weevils are among the most
harmful insects known, their destruction should condone some, at least,
of the sins of which the bird is accused. Grasshoppers constitute nearly
5 per cent of the food, while the rest of the animal matter is made up
of various insects, a few snails, and crustaceans. The few dragon flies
found were probably picked up dead, for they are too active to be taken
alive, unless by a bird of the flycatcher family. So far as the insect
food as a whole is concerned, the red-wing may be considered entirely
beneficial.

The interest in the vegetable food of this bird centers around grain.
Only three kinds, corn, wheat, and oats, were found in the stomachs
in appreciable quantities. They aggregate but little more than 13
per cent of the whole food, oats forming nearly half of this amount.
Field investigation has shown, however, that, when local conditions
are favorable, large flocks of red-wings may do considerable damage.
Conspicuous among such cases are the losses suffered by farmers to sweet
corn in some of the northeastern States and to milo in the South and
West. In the rather limited grain-raising area of the Imperial Valley
of California the annual damage to milo alone by enormous flocks of
red-wings and yellow-headed blackbirds has been estimated to be fully
$50,000. The most important item of the bird's food, however, is weed
seed, which forms practically all of its food in winter and about 57
per cent of the fare of the whole year. The principal weed seeds eaten
are those of ragweed, barnyard grass, and smartweed. That these seeds
are preferred is shown by the fact that the birds begin to eat them in
August, when grain is still readily obtainable, and continue feeding on
them even after insects become plentiful in April. The red-wing eats very
little fruit and does practically no harm to garden or orchard. It is
apparent that where moderately abundant, the red-wing does more good than
harm, but in sections where it becomes excessively abundant a reduction
in its numbers is justifiable.



BOBOLINK.


[Illustration: Fig. 15.--Bobolink, ricebird, or reed bird. Length, about
7 inches.]

The bobolink, ricebird, or reedbird[43] (fig. 15) is a common summer
resident of the United States, north of about latitude 40°, and from
New England westward to the Great Plains, wintering beyond our southern
border. In New England there are few birds about which so much romance
clusters as this rollicking songster, naturally associated with sunny
June meadows; but in the South there are none on whose head so many
maledictions have been heaped on account of its fondness for rice. During
its sojourn in the Northern States it feeds mainly upon insects and seeds
of useless plants; but while rearing its young, insects constitute its
chief food, and almost the exclusive diet of its brood. After the young
are able to fly, the whole family gathers into a small flock and begins
to live almost entirely upon vegetable food. This consists for the most
part of weed seeds, since In the North these birds do not appear to
attack grain to any great extent. They eat a few oats, but their stomachs
do not reveal a great quantity of this or any other grain. As the season
advances they gather into larger flocks and move southward, until by the
end of August nearly all have left their breeding grounds. On their way
they frequent the reedy marshes about the mouths of rivers and on the
inland waters of the coast region and subsist largely upon wild rice. In
the Middle States, during their southward migration, they are commonly
known as reedbirds, and, becoming very fat, are treated as game.

[43] _Dolichonyx oryzivorus_.

Formerly, when the low marshy shores of the Carolinas and some of the
more southern States were devoted to rice culture the bobolinks made
great havoc both upon the sprouting rice in spring and upon the ripening
grain on their return migration in the fall. While the damage is not
so great as when this region was the center of rice production, still
it amounts to many thousands of dollars annually. As a remedy, an open
season on ricebirds was provided in the Coast States from New Jersey to
Florida.



CROW.


In one or another of its geographic races the common crow[44] (fig. 16)
breeds in great numbers throughout the States east of the Plains and
from the Gulf well up into Canada, while in less abundance it is found
in California and in the Northwestern States. During the colder months a
southern migratory movement brings most of these birds within the borders
of the United States, and at about the latitude of Philadelphia and
southern Illinois we find them congregating nightly in roosts. Farmers
dwelling in the vicinity of such roosts frequently suffer losses to
shocked corn.

[44] _Corvus brachyrhynchos_.

In fact, none of our native birds so much concerns the average farmer of
the Eastern States as the common crow. Many of our present criticisms
of this bird, as its pulling sprouting corn, feeding on ripening ears,
damaging fruits of various kinds, destroying poultry and wild birds,
and disseminating diseases of live-stock, were common complaints in the
days of the early colonists. Many of the virtues of the crow, now quite
generally recognized, also have been matters of record for many years. In
recent times, however, scientific study of these problems, including the
examination of the stomachs of hundreds of crows secured in every month
of the year and under a variety of conditions, has enabled us to render a
much fairer verdict than was formerly possible.

The crow is practically omnivorous. During spring and early summer any
form of insect life seems to make a desirable item in its diet, and in
winter when hard pressed nothing in the animal or vegetable kingdoms
which contains a morsel of nutriment is overlooked.

The insect food of the crow, which comprises about a fifth of its yearly
sustenance, does much to atone for its misdemeanors. Grasshoppers,
May beetles and their larvæ (white grubs), caterpillars, weevils, and
wireworms stand out prominently. In 1,340 stomachs of adults examined
these highly Injurious forms comprised over 80 per cent of the insect
food. Grasshoppers are naturally taken in greatest abundance late in the
season. September being the month of largest consumption, when they form
about a fifth of the total food. May beetles and white grubs are eaten
in every month, but occur most prominently in May. In June caterpillars
are a favorite food, and weevils of various kinds are taken in varying
quantities throughout summer and fall. About half of the remaining
20 per cent of insect food is composed of beneficial ground beetles,
ladybirds, predacious bugs, and parasitic wasps, and related forms, the
rest consisting of neutral or injurious forms. Numerous instances are on
record where fields badly infested with white grubs or grasshoppers have
been favorite resorts of crows, whose voracity has resulted in a material
suppression of the pest. When the amount of food required to sustain the
individual crow is considered, the work of these birds appears all the
more important Single stomachs containing upward of 50 grasshoppers are
not uncommon. Thus in its choice of insect food the crow is rendering an
important service to the farmer.

[Illustration: Fig. 16.--Crow. Length, about 19 inches.]

In the other animal food of the crow are several items of the utmost
economic importance. Spiders are taken in considerable numbers in May and
June, but the yearly total is a little over 1 per cent of the food. In
early spring crawfish are eagerly sought, and other aquatic food, as fish
and mollusks, lend variety to the crow's bill of fare the year round.
In the consumption of toads, salamanders, frogs, and some snakes, which
together compose a little over 2 per cent of the yearly food, the crow is
doubtless doing harm. Small rodents occurred in the stomachs collected
nearly every month, but it Is often difficult to determine whether small
mammals found in birds' stomachs were taken alive or found dead.

From its carrion-eating habits the crow has been unfairly criticized as
a disseminator of live-stock diseases. While this may be to some extent
just, the fact that there are many other important carriers which lie
largely beyond our control, shows that we must seek final relief only
through the strictest methods of sanitation.

The nest-robbing habit of the crow, long a serious criticism, is verified
by stomach analysis. Of the 1,103 crows examined, 47 had fed on wild
birds or their eggs, and the eggs of domestic fowls were found somewhat
more frequently. The crow's habit of rummaging about garbage piles may
explain much of this latter material.

Of the vegetable food, corn, which is eaten every month, is the most
important item and forms about 38 per cent of the diet. Much of this,
however, must be considered waste, since over 60 per cent of it is
consumed from the first of November to the end of March. During the
periods when corn is sprouting and when in the "roasting-ear" stage the
crow is eating this grain at a rate considerably less than the yearly
average, and the months of smallest consumption are July and August. At
times, however, the damage to corn becomes a serious problem, and were
it not possible to make use of such deterrents as coal tar upon seed
corn there would be little friendship for the crow in some sections of
the East. The "pulling" of corn is a trait most prevalent in small-field
areas. Wheat and oats suffer similar damage at times, especially in the
Northwestern States, where these grains predominate. About the only
safeguard to ripening grain is the constant use of powder and shot or the
scarecrow.

Various kinds of cultivated fruits are also eaten, and local damage
to such crops as apples, melons, peas, beans, peanuts, and almonds is
occasionally reported. In long, rigorous winters, the crow, like other
birds, resorts to the fruit of numerous wild plants, as dogwood, sour
gum, hackberry, smilax, and the several species of sumac and poison ivy.

Damage to the eggs of poultry may be reduced to a minimum by careful
housing of lasting hens, and the farmer can protect his sprouting grain
to a large extent by the use of tar-coated seed. It will be well also
to keep the crow within reasonable numbers on game preserves and public
parks where it is desired to encourage the nesting of smaller birds.
While legal protection is not needed for so wary an individual as the
crow, it seems well, where local conditions have not aggravated some
particular shortcomings of the bird, to allow it to continue the good
services gendered to man in the destruction of noxious insects.



BLUE JAY.


The blue jay[45] (fig. 17) is a conspicuous member of our bird population
east of the Plains, especially in autumn when his brilliant plumage
contrasts vividly with the brown> foliage. Even in winter he stays with
us, though at this time he is less common along our northern border. In
spring and summer, while by no means uncommon, the blue jay is not so
often noticed, as the retiring disposition which he assumes during the
breeding season assists in protecting him from enemies. This also allows
him to carry on with considerable impunity that inglorious practice of
nest robbing of which, in a measure, he has been rightfully accused.

[45] _Cyanocitta cristata_.

[Illustration: Fig. 17.--Blue Jay. Length, about 11½ inches.]

Examination of 530 stomachs collected at all times of the year in 30
of our Eastern States and Canada shows that insects comprise about 22
per cent of the yearly sustenance. About three-fourths of these are
injurious, the remainder being neutral or beneficial. Of the injurious
insects, grasshoppers form the largest portion; in August nearly a fifth
of the food. Caterpillars are conspicuous in July and August and at this
time average about a tenth of the stomach contents. Both laboratory
investigations and field observations have established the fact that in
winter the eggs of the tent caterpillar and the hibernating larvæ of the
brown-tail moth in New England are eagerly sought Scarabæid beetles form
about 4 per cent of the yearly food, and click beetles and wire-worms
about 1 per cent. Of the beneficial forms, ground beetles (3 per cent)
and hymenopterous insects, part of which are parasitic (2.5 per cent),
are taken most frequently. A few other invertebrates, as spiders,
millipedes, mollusks, and crustaceans, also are eaten throughout the year.

In the consideration of the vertebrate food of the blue jay we are
confronted with the problem of the destruction of wild birds and their
eggs. Special search was made for every possible trace of such material
in the stomachs, and in 6 of the 530 were found the remains of wild birds
or their eggs. In February two jays had killed a small bird apiece; in
May one had robbed a nest of eggs; in June two had taken a small bird and
a clutch of eggs, respectively; and in August another had robbed a nest
As this trait of the jay appears to be most pronounced during its own
breeding season, it is quite possible for many birds which have suffered
from its boldness early in the season to raise another brood unmolested.
Thirty-nine of the 530 jays examined had fed on hen's eggs. Much of this
food, however, was picked up about rubbish heaps, to which the jay, like
other members of the crow family, is partial. While the result of stomach
analysis would appear to belittle this fault of the blue jay, it is
doubtless quite characteristic of the bird under favorable conditions.

Complaint that the jay is the source of considerable damage to corn in
the fall has been verified to a certain degree by stomach examination.
This grain is taken in every month of the year, but in greater
quantities during winter and early spring, when much of it is necessarily
waste, and it forms about 18 per cent of the yearly food. Cultivated
fruits of various kinds are eaten from June to the end of the year, and
the 15 per cent taken in July apparently justifies complaints against
the bird on this score. The favorite vegetable food of the blue jay is
mast of various kinds, acorns predominating, but beechnuts, chestnuts,
chinquaquins, and hazelnuts also are relished. This food is important in
every month but July and August, the yearly average being over 43 per
cent, and from October to March it constitutes about two-thirds of the
diet. Occasionally harm is done by feeding also on cultivated nuts, as
pecans. Wild fruits are eaten during the summer and fall and constitute
about 7 per cent of the yearly sustenance.

The blue jay probably renders its best services to man in destroying
grasshoppers late in the season and in feeding on hibernating insects and
their eggs, as it does in the case of the tent caterpillar and brown-tail
moth. Such forest insects as buprestid beetles and weevils of various
kinds also fall as its prey.

The blue jay's vegetable food, with the exception of some cultivated
fruit and corn in the fall, is largely neutral. The severest criticism
against the species is the destruction of other birds and their eggs.
Where we wish to attract birds in large numbers about our dooryards, in
our parks, and in game preserves, it will be well not to allow the jays
to become too abundant.



PACIFIC COAST JAYS.


In California and adjacent States two species of jays are much in
evidence under several more or less well-marked forms.

The Steller jay[46] much resembles the eastern bird, but it is more shy
and retiring and seldom visits the orchard or vicinity of the ranch
buildings. Stomach examination shows that its food does not radically
differ from that of the eastern blue jay. As is the case with that bird,
a very considerable part of the food consists of mast, together with
a little fruit and some insects. The insects are largely wasps, with
some beetles and grasshoppers. This jay also eats some grain, which is
probably waste or volunteer. No complaints, so far as known, are made
against this bird. Until it shall become less wary it is not likely to
trespass to a serious extent upon the farmer's preserve.

[46] _Cyanocitta stelleri_.

The California jay,[47] although of a different genus, more nearly
resembles its eastern relative in food habits and actions. It freely
visits the stockyards near ranch buildings, and orchards and gardens. As
a fruit stealer it is notorious. One instance is recorded where seven
jays were shot from a prune tree, one after the other, the dead bodies
being left under the tree until all were killed. So eager were the birds
to get the fruit that the report of the gun and the sight of their dead
did not deter them from coming to the tree. In orchards in canyons or on
hillsides adjacent to chaparral or other cover great mischief is done by
this bird. In one such case an orchard was under observation at a time
when the prune crop was ripening, and jays in a continuous stream were
seen to come down a small ravine to the orchard, prey upon the fruit, and
return.

[47] _Aphelocoma californica_.

Fruit stealing, however, is only one of the sins of the California jay.
That it robs hens' nests is universal testimony. A case is reported of a
hen having a nest under a clump of bushes; every day a jay came to a tree
a few rods away, and when it heard the cackle of the hen announcing a new
egg it flew at once to the nest. At the same time the mistress of the
house hastened to the spot to secure the prize, but in most cases the jay
won the race. This is only one of many similar cases recounted. The jays
have learned just what the cackle of the hen means. Another case more
serious is that related by a man engaged in raising white leghorn fowls
on a ranch several miles up a canyon. He stated that when the chicks were
very young the jays attacked and killed them by a few blows of the beak
and then pecked open the skull and ate out the brains. In spite of all
efforts to protect the chicks and kill the jays the losses in this way
were serious.

Examination of the stomachs of 326 California jays shows that 27 per cent
of the contents for the year consists of animal matter and 73 per cent
of vegetable. Although the great bulk of the animal food is made up of
insects, the remains of eggshells and birds' bones appear much too often.
The insect food is fairly well distributed among the more common orders,
but grasshoppers are slightly the most numerous and constitute 4.5 per
cent of the year's food. In July, August, and September, however, the
amount is 14, 18, and 19 per cent, respectively. Four per cent of the
food consists of wasps, bees, etc., but in the three months named they
constitute 15, 7, and 9 per cent, respectively. A worker honeybee found
in each of two stomachs is rather surprising, for it is unusual to find
a bird like the jay eating these active and elusive insects, which enter
into the diet of the flycatchers. The remainder of the insect food is
pretty evenly distributed among beetles, bugs, flies, and caterpillars.
Eggshells were found in 21 stomachs and birds' bones in 5. Six stomachs
contained the bones of mammals and two those of a lizard. No bird has a
worse reputation for nest robbing than has the eastern jay, and yet of
530 stomachs of the eastern species only 6 contained eggshells or the
bones of birds. This comparison serves to show what a marauder and nest
thief the California jay really is.

In its vegetable diet this bird much resembles its eastern relative,
the most remarkable difference being in the matter of fruit eating.
With greater opportunities the California bird has developed a greater
appetite for fruit and indulges it to the fullest extent. Remains of
fruit were found in 220 of the 326 stomachs. The percentage for the year
is only 16, but for the four months of June, July, August, and September
it is 44, 33, 53, and 25, respectively. Cherries, apricots, and prunes
are the favorites among cultivated fruits, and elderberries are relished
to some extent. Grain, which was found in 48 stomachs, amounts to 6 per
cent of the food of the year. Practically all of it was taken in the
four months above mentioned, but it is not probable that much damage
is done by the jay in this respect. The major portion of the grain was
oats. What was not wild was probably simply scattered grain gleaned
after the harvest. Mast is eaten by the California jay from September
to March, inclusive, and constitutes during most of that period one of
the principal elements of its food. In this respect the bird shows a
remarkable similarity to the eastern species. A few weed seeds and other
miscellaneous items make up the balance of the vegetable food.

In summing up from an economic point of view the character of the food of
the California jay, it must be conceded that it is not all that could be
wished. Its taste for birds' eggs and fruit is entirely too pronounced,
and at present the species is superabundant in California. While the
natural food supply of the bird has been lessened by bringing the woods
and brushy canyons under cultivation, the same areas have been planted to
fruit, and naturally the jay takes the fruit as an acceptable substitute.
A considerable reduction of the bird's numbers would appear to be the
only effective remedy.



THE PHŒBES.


Among the early spring arrivals to their northern homes none is more
welcome than the phœbe (fig. 18). The common phœbe[48] breeds
throughout the United States east of the Great Plains, and winters from
the South Atlantic and Gulf States southward. Its western relative, the
black phœbe,[49] is found from Texas west to the Pacific coast, which
it occupies as far north as Washington, replacing through most of this
region the common or eastern form.

[48] _Sayornis phœbe_.

[49] _Sayornis Nigricans_.

Though naturally building its nest under an overhanging cliff of rock
or earth, or in the mouth of a cave, the preference of the eastern
species for the vicinity of farm buildings is so marked that in the more
thickly settled parts of the country the bird is seldom seen at any
great distance from a farmhouse, except where a bridge spanning a stream
affords a secure spot for a nest. Its confiding disposition renders it a
great favorite, and consequently it is seldom disturbed.

The phœbe subsists almost exclusively upon insects, most of which are
caught upon the wing. An examination of 370 stomachs showed that over 89
per cent of the year's food consists of insects and spiders, while wild
fruit constitutes the remainder. The insects belong chiefly to noxious
species, and include many click beetles. May beetles, and weevils.
Other beetles, belonging to 21 families that were identified, make up
10.65 per cent. They appear to be eaten very regularly in every month,
but the most are taken in spring and early summer. May is the month of
maximum consumption, with 20.43 per cent. Beetles altogether amount to
15.3 per cent, which places them second in rank of the items of animal
food. The notorious cotton-boll weevil was found in six stomachs taken
in the cotton fields of Texas and Louisiana, and five individuals of the
strawberry weevil were taken from one collected in Texas. Many other
beetles contained In the stomachs are equally harmful, but are not so
widely known. Such are the corn leaf-beetle, which feeds upon corn; the
12-spotted cucumber beetle, and the striped cucumber beetle, both of
which seriously injure and sometimes destroy cucumber and squash vines;
and the locust leaf miner, which is sometimes so numerous that all the
locust trees over large areas are blasted as by fire.

In the phœbe's diet hymenopterous insects stand at the head, as
is the case with most of the flycatchers. They are eaten with great
regularity and are the largest item in nearly every month. A few are
useful parasitic species, but these are offset by a number of sawfly
larvæ, which are very harmful insects. Ants were found in 24 stomachs.
No honeybees were identified. In their season grasshoppers are much
relished, while wasps of various forms, many flies of species that annoy
cattle, and a few bugs and spiders are also eaten regularly. It is
evident that a pair of phœbes must materially reduce the number of
insects near a garden or field, as the birds often, if not always, raise
two broods a year, and each brood numbers from four to six young.

There is hardly a more useful species about the farm than the phœbe,
and it should receive every encouragement. To furnish nesting boxes is
helpful, but not necessary, as it usually prefers a more open situation,
like a shed or a nook under the eaves, but it should be protected from
cats and other marauders.

[Illustration: Fig. 18.--Phœbe. Length, about 6½ inches.]

The black phœbe has the same habits as its eastern relative, both as
to selection of food and nesting sites, preferring for the latter purpose
some structure of man, as a shed or, better still, a bridge over a stream
of water, and the preference of the black phœbe for the vicinity of
water is very pronounced. One may always be found at a stream' or pool
and often at a watering trough by the roadside.

Careful study of the habits of the bird shows that it obtains a large
portion of Its food about wet places. While camping beside a stream in
California the writer took some pains to observe the habits of the black
phœbe. The nesting season was over, and the birds had nothing to do
but eat. This they appeared to be doing all the time. When first observed
in the morning, at the first glimmer of daylight, a phœbe was always
found flitting from rock to rock, although it was so dusky that the bird
could hardly be seen. This activity was kept up all day. Even in the
evening, when it was so dark that notes were written by the aid of the
camp fire, the phœbe was still engaged in its work of collecting,
though it was difficult to understand how it could catch insects when
there was scarcely light enough to see the bird. Exploration of the
stream showed that every portion of it was patrolled by a phœbe, that
each one apparently did not range over more than 12 or 13 rods of water,
and that sometimes two or three were in close proximity.

The number of insects destroyed in a year by the black phœbe is
enormous. Fortunately, the examination of stomachs has supplemented
observation in the field, and we are enabled to give precise details. Of
the 333 stomachs examined, every one contained insects as the great bulk
of the food. Only 15 contained any vegetable food at all, and in no case
was it a considerable part of the contents of the stomach. The insects
eaten were mostly wasps, bugs, and flies, but many beetles also were
destroyed.

Useful beetles belonging to three families amount to 2.8 per cent of the
food. Other beetles of harmful or neutral species reach 10.5 per cent.
Wasps, the largest item of the food, were found in 252 stomachs and
were the whole contents of 15. The average for the year is 35 per cent.
Parasitic species were noted, but they were very few. Ants were found in
48 stomachs, and for a short time in midsummer they constitute a notable
part of the food. Various wild bees and wasps make up the bulk of this
item. No honeybees were found.

Bugs in various forms constitute 10.56 per cent and are eaten in every
month but May. Stinkbugs appear to be the favorites, as they were
contained in 10 stomachs. Plant lice were found in one stomach. Flies,
forming the second largest item, were found in 97 stomachs and completely
filled 3. They constitute the most regular article in the black
phœbe's diet. The maximum consumption occurs in April, 64.3 per cent.
The black phœbe well merits its title of flycatcher.

Moths and caterpillars amount to 8.2 per cent of the food. They were
found in 72 stomachs, of which 51 contained the adult moths and 28 the
larvæ or caterpillars. One stomach was entirely filled with adults. This
is one of the few birds studied by the writer that eats more moths than
caterpillars, for as a rule the caterpillars are largely in excess.
Flycatchers, taking their food upon the wing, would naturally prove
exceptions to the rule. Crickets are evidently not a favorite food of the
black phœbe, as they amount to only 2.45 per cent. They were found in
39 stomachs, but usually the amount in each was small, though one stomach
was entirely filled with them. Grasshoppers did not appear. Dragon flies
were eaten to some extent, and these illustrate the fondness of the
species for the neighborhood of water.

The vegetable matter eaten consisted chiefly of small wild fruits of no
economic importance.

Another phœbe inhabiting the Western States and breeding as far north
as Alaska is the Say phœbe.[50] Investigation of its food was based
on the examination of 86 stomachs, and while none were available for the
months when insects are most numerous, the bird proved to be one of the
most exclusively insectivorous of the family. That it takes a few useful
insects can not be denied, but these are far outnumbered by the harmful
ones it destroys, and the balance is clearly in favor of the bird. Its
vegetable food amounts to only 2 per cent and is made up of a little wild
fruit, seeds, and rubbish.

[50] _Sayornis sayus_.



THE KINGBIRDS.


The well-known eastern kingbird[51] (fig. 19) is essentially a lover of
the orchard, though groves and the edge of forests were probably its
original habitat. It breeds in the States east of the Rocky Mountains,
and less commonly in the Great Basin and on the Pacific coast. Its
hostility to hawks and crows is proverbial, and for this reason a family
of kingbirds is a desirable adjunct to a poultry yard. On one occasion
in the knowledge of the writer a hawk which attacked a brood of young
turkeys was pounced upon and so severely buffeted by a pair of kingbirds
whose nest was near by that the would-be robber was glad to escape
without his prey. Song birds that nest near the kingbird are similarly
protected.

[51] _Tyrannus tyrannus_.

The kingbird is largely insectivorous. It is a true flycatcher and takes
on the wing a large part of its food. It does not, however, confine
itself to this method of hunting, but picks up some insects from trees
and weeds, and even descends to the ground in search of myriapods
or thousand legs. The chief complaint against the species by both
professional bee keepers and others has been that it preys largely upon
honeybees. One bee raiser in Iowa, suspecting the kingbirds of feeding
upon his bees, shot a number near his hives; but when the stomachs of the
birds were examined by an expert entomologist, not a trace of honeybees
could be found.

An examination of 665 stomachs collected in various parts of the
country, was made by the Biological Survey, but only 22 were found to
contain remains of honeybees. In these 22 stomachs there were in all 61
honeybees, of which 51 were drones, 8 were certainly workers, and the
remaining 2 were too badly broken to be further identified.

The insects that constitute the great bulk of the food of the bird
are noxious species, largely beetles--May beetles, click beetles (the
larvæ of which are known as wire-worms), weevils, which prey upon
fruit and grain, and a host of others. Wasps, wild bees, and ants are
conspicuous elements of the food, far outnumbering the hive bees.
During summer many grasshoppers and crickets, as well as leaf hoppers
and other bugs, also are eaten. In the stomachs examined were a number
of robber files--insects which prey largely upon other insects,
including honeybees, and which are known to commit in this way extensive
depredations. It is thus evident that the kingbird by destroying these
flies actually does good work for the apiarist. The 26 robber flies found
in the stomachs may be considered more than an equivalent for the 8
worker honeybees already mentioned. A few caterpillars are eaten, mostly
belonging to the group commonly known as cutworms, all the species of
which are harmful.

About 11 per cent of the food consists of small native fruits, comprising
some 30 common species of the roadsides and thickets, as dogwood berries,
elderberries, and wild grapes. The kingbird is not reported as eating
cultivated fruit to an injurious extent, and it is very doubtful if this
is ever the case.

In the Western States the Arkansas kingbird[52] is not so domestic in
its habits as its eastern relative, preferring to live among scattering
oaks on lonely hillsides, rather than in orchards about ranch buildings.
The work it does, however, in the destruction of noxious insects fully
equals that of any member of its family. Like other flycatchers, it
subsists mostly upon insects taken in mid-air, though it eats a number
of grasshoppers, probably taken from the ground. The bulk of its food
consists of beetles, bugs, wasps, and wild bees. Like its eastern
representative, it has been accused of feeding to an injurious extent
upon honeybees. In an examination of 62 stomachs of this species,
great care was taken to identify every insect or fragment that had any
resemblance to a honeybee; as a result, 30 honeybees were identified, of
which 29 were males or drones and 1 a worker. These were contained in
four stomachs, and were the sole contents of three; in the fourth they
constituted 99 per cent of the food. It is evident that the bee-eating
habit is only occasional and accidental, rather than habitual; and it is
also evident that if this ratio of drones to workers were maintained, the
bird would be of more benefit than harm to the apiary.

[52] _Tyrannus verticalis_.

[Illustration: Fig. 19.--Kingbird. Length, about 8½ inches.]

The Cassin kingbird[53] has a more southerly range than the Arkansas
flycatcher. Examination of a number of stomachs shows that its food
habits are similar to those of others of the group.

[53] _Tyrannus vociferans_.

Three points seem to be clearly established in regard to the food of
the kingbirds--(1) that about 90 per cent consists of insects, mostly
injurious species; (2) that the alleged habit of preying upon honeybees
is much less prevalent than has been supposed, and probably does not
result in any great damage; and (3) that the vegetable food consists
almost entirely of wild fruits which have no economic value.

All of the kingbirds are of the greatest importance to the farmer and
fruit grower, as they destroy vast numbers of harmful insects, and do no
appreciable damage to any product of cultivation.



NIGHTHAWK.


The nighthawk, or bull-bat,[54] breeds throughout most of the United
States and Canada, and winters in South America. It is strictly
insectivorous, and hence does no damage to crops. The only charge that
can be made against the bird is that it destroys some useful insects, but
these are greatly in the minority in its food.

[54] _Chordeiles virginianus_.

Nighthawks are so expert in flight that no insects can escape them. In
their capacious mouths they sweep up everything from the largest moths
and dragon flies to the tiniest ants and gnats, and in this way sometimes
gather most remarkable collections of insects. Several stomachs have
contained 50 or more different kinds, and the number of individuals ran
into the thousands.

Nearly a fourth of the birds' total food is composed of ants. These
Insects are generally annoying and often very injurious, especially on
account of their damage to stored products and because of their habit of
fostering destructive plant lice. More than a fifth of the nighthawk's
food consists of June bugs, dung beetles, and other beetles of the
leaf-chafer family. These are the adults of white grubs, noted pests, and
even as adults many members of the family are decidedly harmful.

Numerous other injurious beetles, as click beetles, wood borers, and
weevils, are relished. True bugs, moths, flies, grasshoppers, and
crickets also are important elements of the food. Several species of
mosquitoes, including the transmitter of malaria, are eaten. Other
well-known pests consumed by the nighthawk are Colorado potato beetles,
cucumber beetles, rice, clover-leaf, and cotton-boll weevils, billbugs,
bark beetles, squash bugs, and moths of the cotton worm.

Nighthawks are much less numerous than formerly, chiefly because of
wanton shooting. They are given full legal protection almost everywhere,
and citizens should see that the law is obeyed. The bird is far too
useful and attractive to be persecuted.



THE WOODPECKERS.


[Illustration: Fig. 20.--Hairy woodpecker. Length, about 9 inches.]

Five or six species of woodpeckers are familiarly known throughout the
eastern United States, and In the West are replaced by others of similar
habits. Several species remain in the Northern States through the entire
year, while others are more or less migratory.

Farmers are prone to look upon woodpeckers with suspicion. When the birds
are seen scrambling over fruit trees and pecking holes in the bark, it
is concluded that they must be doing harm. Careful observers, however,
have noticed that, excepting a single species, these birds rarely leave
any conspicuous mark on a healthy tree, except when it is affected by
wood-boring larvæ, which are accurately located, dislodged, and devoured
by the woodpecker.

Two of the best-known woodpeckers, the hairy woodpecker[55] (fig.
20) and the downy woodpecker,[56] including their races, range over
the greater part of the United States. They differ chiefly in size,
their colors being practically the same. The males, like those of
many other woodpeckers, are distinguished by a scarlet patch on the
head. An examination of many stomachs of these two species shows that
from two-thirds to three-fourths of the food consists of insects,
chiefly noxious kinds. Wood-boring beetles, both adults and larvæ, are
conspicuous, and with them are associated many caterpillars, mostly
species that burrow into trees. Next in importance are the ants that
live in decaying wood, all of which are sought by woodpeckers and eaten
in great quantities. Many ants are particularly harmful to timber, for
if they find a small spot of decay in the vacant burrow of a wood borer,
they enlarge the hole, and, as their colony is always on the increase,
continue to eat away the wood until the whole trunk is honeycombed.
Moreover, they are not accessible to birds generally, and could pursue
their career of destruction unmolested were it not that the woodpeckers,
with beaks and tongues especially fitted for such work, dig out and
devour them. It is thus evident that woodpeckers are great conservators
of forests. To them more than to any other agency we owe the preservation
of timber from hordes of destructive insects.

[55] _Dryobates villosus_.

[56] _Dryobates pubecens_.

[Illustration: Fig. 21.--Flicker. Length, about 12½ inches.]

One of the larger woodpeckers familiar to everyone is the flicker, or
golden-winged woodpecker[57] (fig. 21), which is generally distributed
throughout the United States from the Atlantic coast to the Rocky
Mountains. There it is replaced by the red-shafted flicker,[58] which
extends westward to the Pacific. The two species are as nearly identical
in food habits as their respective environments will allow. The flickers,
while genuine woodpeckers, differ somewhat in habits from the rest of
the family, and are frequently seen searching for food upon the ground.
Like the downy and hairy woodpeckers, they feed upon wood-boring grubs
and ants, but the number of ants eaten is much greater than that eaten
by the other two species. Of the flickers' stomachs examined, three were
completely filled with ants. Two of these contained more than 3,000
individuals each, while the third contained fully 5,000. These ants
belong to species which live in the ground. It is these insects for
which the flicker searches when it runs about in the grass, although
some grasshoppers also are then taken. The flicker's habit of pecking
holes in buildings sometimes greatly annoys its human friends, and it
is particularly noticeable in the California species. Observation has
shown that the object of the work is to obtain shelter for the winter.
In the East most of the flickers are migratory, and only a few remain
North where shelter is necessary. These generally find a safe retreat
in the hollow tree In which they nested. In California, however, where
the birds do not migrate, trees are not so abundant as in the East, and
consequently buildings are brought into requisition, and in them holes
are drilled, usually under the eaves, where snug nights' lodgings are
found. Often a dozen holes may be seen in one building. Barns or other
outbuildings are usually selected, though churches sometimes have been
used.

[57] _Colaptes auratus_.

[58] _Colaptes cafer collaris_.

[Illustration: Fig. 22.--Red-headed woodpecker. Length, about 9½
inches.]

The red-headed woodpecker[59] (fig. 22) is well known east of the Rocky
Mountains, but Is rather rare in New England. Unlike some of the other
species, it prefers fence posts and telegraph poles to trees as a
foraging ground. Its food therefore naturally differs from that of the
preceding species, and consists largely of adult beetles and wasps which
it frequently captures on the wing after the fashion of flycatchers.
Grasshoppers also form an important part of the food. Among the beetles
are a number of predacious ground species and some tiger beetles, which
are useful insects. The red-head has been accused of robbing nests of
other birds, and of pecking out the brains of young birds and poultry;
but as the stomachs showed little evidence to substantiate this charge,
the habit probably is exceptional.

[59] _Melanerpes erythrocephalus_.

The vegetable food of woodpeckers is varied, but consists largely of
small fruits and berries. The downy and hairy woodpeckers eat such
fruits as dogwood and Virginia creeper and seeds of poison ivy, sumac,
and a few other shrubs. The flicker also eats a great many small fruits
and the seeds of a considerable number of shrubs and weeds. None of
the three species is much given to eating cultivated fruits or crops.
The red-head has been accused of eating the larger kinds of fruit, as
apples, and also of taking considerable corn. Stomach examinations show
that to some extent these charges are substantiated, but that the habit
is not prevalent enough to cause much damage. The bird is fond of mast,
especially beechnuts, and when these nuts are plentiful it remains north
all winter.

Woodpeckers apparently are the only agents which can successfully cope
with certain insect enemies of the forest, and, to some extent, with
those of fruit trees also. For this reason, if for no other, they should
be protected in every possible way.



THE CUCKOOS.


Two species of cuckoos are common In the United States east of the Great
Plains, the yellow-billed cuckoo[60] (fig. 23) and the black-billed
cuckoo,[61] and in the West a relative of the yellow-bill, the California
cuckoo,[62] ranges from Colorado and Texas to the Pacific coast. While
the two species are quite distinct, the food habits of the yellow-bill
and the black-bill do not greatly differ and their economic status is
practically the same.

[60] _Coccyzus americanus_.

[61] _Coccyzus erythyropthalmus_.

[62] _Coccyzus americanus occidentalis_.

Examination of 155 stomachs has shown that these species are much given
to eating caterpillars, and, unlike most birds, do not reject those
covered with hair. In fact, cuckoos eat so many hairy caterpillars that
the hairs pierce the inner lining of the stomach and remain there, and
often when the stomach is opened it appears to be lined with a thin
coating of fur.

[Illustration: Fig. 23.--Yellow-billed cuckoo. Length, about 12 inches.]

An examination of the stomachs of 46 black-billed cuckoos, taken during
the summer months, showed the remains of 906 caterpillars, 44 beetles,
96 grasshoppers, 100 sawflies, 30 stinkbugs, and 15 spiders. In all
probability more individuals than these were represented, but their
remains were too badly broken for recognition. Most of the caterpillars
were hairy, and many of them belong to a genus that lives in colonies and
feeds on the leaves of trees, including the apple tree. One stomach was
filled with larvæ of a caterpillar belonging to the same genus as the
tent caterpillar, and possibly to that species. Other larvæ were those
of large moths, for which the bird seems to have a special fondness. The
beetles were for the most part click beetles and weevils, as well as a
few May beetles. The sawflies were contained in two stomachs, one of
which held no less than 60 in the larval stage.

Of the yellow-billed cuckoo, 109 stomachs (collected from May to October)
were examined. They contained 1,865 caterpillars, 93 beetles, 242
grasshoppers, 37 sawflies, 69 bugs, 6 flies, and 86 spiders. As in the
case of the black-billed cuckoo, most of the caterpillars belonged to
hairy species and many of them were of large size. One stomach contained
250 American tent caterpillars; another 217 fall webworms. The beetles
were distributed among several families, all more or less harmful to
agriculture. In the same stomach which contained the tent caterpillars
were 2 Colorado potato beetles; in another were 3 goldsmith beetles, and
remains of several other large beetles. Besides the ordinary grasshoppers
were several katydids and tree crickets. The sawflies were in the larval
stage, in which they resemble caterpillars so closely that they are
commonly called false caterpillars by entomologists. The bugs consisted
of stinkbugs and cicadas, or dog-day harvest flies, with the single
exception of one wheel bug, which was the only useful insect eaten.



BOBWHITE.


No bird is better known to country residents than the bobwhite[63] (see
illustration on title-page). The bird's cheery calls the year round form
part of the most pleasant associations of country life, and its neat form
and harmonious coloration, and especially its confiding habits, make it a
general favorite.

[63] _Colinus virginianus._

Any bushy fence row serves as a retreat for its nest, or for winter
shelter, and weed-covered fields are its favorite feeding places. Weed
seeds form more than half the total food and include those of all
the worst weed pests of the farm. Among them may be mentioned crab,
cockspur, witch, and foxtail grasses, sheep sorrel, smartweed, bindweed,
lamb's-quarters, pigweeds, corn cockle, chickweed, charlock, partridge
pea, beggar lice, nail grass, rib grass, ragweed, and Spanish needles.

Acorns, beechnuts, chestnuts, and pine seeds make up about 2.5 per cent
of the food, and wild fruit about 10 per cent The fruits include berries
of palmetto, smilax, wax myrtle, mulberry, sassafras, blackberries and
raspberries, rose haws, cherry, sumac, grapes, sour gum, blueberries,
honeysuckle, partridgeberry, and a number of others. The bobwhite feeds
to a slight extent upon buds and leaves, including those of yellow and
red sorrel, cinquefoil, and clover.

Grain forms scarcely more than a sixth of the food, and most of it is
taken during winter and early spring when nothing but waste grain is
available The habit of gleaning this after the harvest is beneficial
to the farm, for volunteer grain is not desirable, especially where it
serves to maintain certain insect and fungus pests. Although most of the
grain and seed crops grown upon the farm are represented in bobwhite's
dietary, no significant damage can be attributed to the bird.

Animal food, chiefly insects, composed nearly a sixth of the bird's
subsistence. From June to August, inclusive, when insects are most
numerous, their proportion in the food is about 36 per cent. The variety
of insect food is great and includes a number of the most destructive
agricultural pests. Among them may be mentioned the Colorado potato
beetle, 12-spotted cucumber beetle, bean leaf beetle, squash ladybird,
wire-worms. May beetles, corn billbugs, clover-leaf weevil, army worm,
boilworm, cutworms, and chinch bug.

The food habits of the bobwhite undoubtedly are beneficial and the bird
should be maintained in numbers on every farm. This is not to say that
all shooting should be prohibited, for the bird is very prolific. But its
numbers should not be reduced below what the available nesting sites and
range will support. On the other hand the policy of absolute protection
recently adopted by one of the States is not called for by strictly
economic considerations.


                    *       *       *       *       *


       ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE
                 WHEN THIS PUBLICATION WAS LAST PRINTED


  _Secretary of Agriculture_            Henry A. Wallace.
  _Under Secretary_                     Rexford G. Tugwell.
  _Assistant Secretary_                 M. L. Wilson.
  _Director of Extension Work_          C. W. Warburton.
  _Director of Personnel_               W. W. Stockberger.
  _Director of Information_             M. S. Eisenhower.
  _Director of Finance_                 W. A. Jump.
  _Solicitor_                           Seth Thomas.
  _Agricultural Adjustment              Chester C. Davis,
     Administration_                      _Administrator_.
  _Bureau of Agricultural Economics_    A. G. Black, _Chief_.
  _Bureau of Agricultural Engineering_  S. H. McCrory, _Chief_.
  _Bureau of Animal Industry_           John R. Mohler, _Chief_.
  _Bureau of Biological Survey_         J. N. Darling, _Chief_.
  _Bureau of Chemistry and Soils_       H. G. Knight, _Chief_.
  _Bureau of Dairy Industry_            O. E. Reed, _Chief_.
  _Bureau of Entomology and Plant       Lee A. Strong, _Chief_.
    Quarantine_
  _Office of Experiment Stations_       James T. Jardine, _Chief_.
  _Food and Drug Administration_        Walter G. Campbell, _Chief_.
  _Forest Service_                      Ferdinand A. Silcox, _Chief_.
  _Grain Futures Administration_        J. W. T. Duvel, _Chief_.
  _Bureau of Home Economics_            Louise Stanley, _Chief_.
  _Library_                             Claribel R. Barnett, _Librarian_.
  _Bureau of Plant Industry_            Frederick D. Richey, _Chief_.
  _Bureau of Public Roads_              Thomas H. MacDonald, _Chief_.
  _Weather Bureau_                      Willis R. Gregg, _Chief_.



                                   U. S. GOVERNMENT PRINTING OFFICE: 1935


     For sale by the Superintendent of Documents, Washington, D. C.
                              Price 5 cents


                    *       *       *       *       *


Transcriber Notes


All illustrations were moved so as to not split paragraphs. There does
not appear to be a footnote numbered "2", therefore, the one numbered "3"
and all following footnote numbers were decremented by 1.





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