Some Common Birds Useful to the Farmer (1926 edition)Beal, F. E. L. (Foster Ellenborough Lascelles)
Science
Some Common Birds Useful to the Farmer (1926 edition)
Beal, F. E. L. (Foster Ellenborough Lascelles)
Birds -- United States
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.
Public-domain text, read in full here on John Shaqi.
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