Some Common Birds in Their Relation to AgricultureBeal, F. E. L. (Foster Ellenborough Lascelles)
Science
Some Common Birds in Their Relation to Agriculture
Beal, F. E. L. (Foster Ellenborough Lascelles)
Birds -- United States
The red-headed woodpecker (_Melanerpes erythrocephalus_) (fig. 4) is well
known east of the Rocky Mountains, but is rather rare in New England.
Unlike some of the other species, it prefers fence posts and telegraph
poles to trees as a foraging ground. Its food therefore naturally differs
from that of the preceding species, and consists largely of adult beetles
and wasps, which it frequently captures on the wing, after the fashion
of flycatchers. Grasshoppers also form an important part of the food.
The red-head has a peculiar habit of selecting very large beetles, as
shown by the presence of fragments of several of the largest species in
the stomachs. Among the beetles were quite a number of predaceous ground
beetles, and unfortunately some tiger beetles, which are useful insects.
The red-head has been accused of robbing the nests of other birds; also
of attacking young birds and poultry and peeking out their brains, but
as the stomachs showed little evidence to substantiate this charge it is
probable that the habit is rather exceptional.
[Illustration: Fig. 4.--Red-headed woodpecker.]
It has been customary to speak of the smaller woodpeckers as "sapsuckers,"
under the belief that they drill holes in the bark of trees for the
purpose of drinking the sap and eating the inner bark. Close observation,
however, has fixed this habit upon only one species, the yellow-bellied
woodpecker, or sapsucker (_Sphyrapicus varius_) (fig. 5). This bird has
been shown to be guilty of pecking holes in the bark of various forest
trees, and sometimes in that of apple trees, from which it drinks the sap
when the pits become filled. It has been proved, however, that besides
taking the gap the bird captures large numbers of insects which are
attracted by the sweet fluid, and that these form a very considerable
portion of its diet. In some cases the trees are injured by being thus
punctured, and die in a year or two, but since comparatively few are
touched the damage is not great. It is equally probable, moreover, that
the bird fully compensates for this injury by the insects it consumes.
The vegetable food of woodpeckers is varied, but consists largely of small
fruits and berries. The downy and hairy woodpeckers eat such fruits as
dogwood, Virginia creeper, and others, with the seeds of poison ivy,
sumac, and a few other shrubs. The flicker also eats a great many small
fruits and the seeds of a considerable number of shrubs and weeds. None of
the three species is much given to eating cultivated fruits or crops.
The red-head has been accused of eating the larger kinds of fruit, such
as apples, and also of taking considerable corn. The stomach examinations
show that to some extent these charges are substantiated but that the
habit is not prevalent enough to cause much damage. It is quite fond of
mast, especially beechnuts, and when these nuts are plentiful the birds
remain north all winter, instead of migrating as is their usual custom.
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