Life histories of North American woodpeckersBent, Arthur Cleveland
Science
Life histories of North American woodpeckers
Bent, Arthur Cleveland
Birds -- North America; Woodpeckers -- North America
The Biological Survey (A. L. Nelson) has kindly made reply to my
inquiry concerning stomach examinations of the subspecies _abieticola_
alone. Data were available from 23 specimens, three collected in
January, two in June, two in July, six in October, eight in November,
and two in December. They were collected, two in Canada, two in New
Brunswick, four in New York, four in Pennsylvania, six in Michigan, two
in Illinois, two in Minnesota, and one in Iowa.
Animal food amounted to 83 percent of the whole; vegetable, 17 percent,
with but a trace of gravel (one stomach only). The chief item was ants,
principally large black ants, such as _Camponotus_ and _Crematogaster_;
this item alone constituted 60 percent of the whole. The animal
food otherwise consisted of a variety of beetles and of a very few
(2 percent) caterpillars. The vegetable food was made up of wild
berries (_Ilex_, _Cassine_, _Vitis cordifolia_, _Nyssa sylvatica_, and
_Viburnum nudum_--in all, 11 percent of the whole), mast (2 percent),
and rotten wood (4 percent).
Catesby’s (1731) assertion, repeated time and again by the earlier
writers, that the pileated woodpecker sometimes pierces the husks of
maize standing in the field, was almost certainly based on faulty
observation. No modern confirmation is to be found of this or of any
other predatory practice. To the contrary, the finding after careful
investigation (Beal, 1911) is: “The food of the pileated woodpecker
does not interest the farmer or horticulturist, for it is obtained
entirely from the forest or the wild copses on its edge. This bird does
not visit either the orchard or the grain field, and all its work in
the forest helps to conserve the timber * * *. Its killing should be
strictly prohibited at all times.”
_Behavior._--The bird is but little known--surprisingly little,
considering how large a bird it is. It is a forest dweller; it lives
almost wholly within the canopy of the treetops; it is alert, furtive
(almost) as a bear, rather silent in midsummer (the season when city
dwellers ordinarily visit the northern forests); and it easily eludes
observation. It is not strange then that, its gigantic operations
remaining in evidence, the bird itself should in common thought have
become a somewhat fabulous creature. Thoreau (1906) never saw it; and
this is what he wrote of it in the Moosehead Lake journal under date
of July 25, 1857: “Our path up the bank here led by a large dead white
pine, in whose trunk near the ground were great square-cornered holes
made by the woodpeckers. * * * They were seven or eight inches long
by four wide and reached to the heart of the tree through an inch or
more of sound wood, and looked like great mortise-holes whose corners
had been somewhat worn and rounded by a loose tenon. The tree for some
distance was quite honeycombed by them. It suggested woodpeckers on a
larger scale than ours, as were the trees and the forest.”
Public-domain text, read in full here on John Shaqi.
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