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 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._
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 the 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 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.
[Illustration: Fig. 11.—Purple grackle. Length, about 12 inches.]
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.
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