Some Common Birds Useful to the Farmer (1915 edition) — John Shaqi
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 food of the brown thrasher consists of both fruit and insects. An
examination of 636 stomachs showed 36 per cent of vegetable and 64 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 swamps 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 fruits
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.
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