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
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 woolly 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 habit, 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 in 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.
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