Some Common Birds Useful to the Farmer (1915 edition)Beal, F. E. L. (Foster Ellenborough Lascelles)
Science
Some Common Birds Useful to the Farmer (1915 edition)
Beal, F. E. L. (Foster Ellenborough Lascelles)
Birds -- United States
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
flies—insects which prey largely upon other insects, especially
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.
[Illustration: Fig. 19.—Kingbird. Length, about 8½ inches.]
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 midair, 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 take 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._
The Cassin kingbird[53] has a more southerly range than the Arkansas
fly-catcher. Examination of a number of stomachs shows that its food
habits are similar to those of others of the group.
[53] _Tyrannus vociferans._
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