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 hole was in the top of a great primeval white oak,
standing in the bottom of a wooded ravine and at the edge
of a neglected clearing, in southern Beaver County. I had
discovered it a month or six weeks before, attracted by
the calls of the bird. The hole was drilled in a dead and
vertically standing bough about eight inches in diameter,
in the very centre of the crown of the oak, and was, I
should say, about eighty feet above the ground; it was
drilled in the northern side of the bough, and beneath the
talus of a branch which had died and fallen away, leaving
a knot-hole a few inches above. The woodpeckers’ hole was
newly cut, and the bark around and beneath it had been
trimmed by use or by design, so that the region about
formed a tawny patch upon the grey of the bough.
S. A. Grimes (1932) mentions four cases that have come under his
observation, in which red-bellied woodpeckers have occupied old nests
of red-cockaded woodpeckers in Florida. F. M. Phelps (1914) mentions
another similar case.
_Eggs._--The red-bellied woodpecker lays three to eight eggs, usually
four or five. It is a persistent layer; if the first set is taken, it
will lay a second set within a week or two, generally in the same nest.
Mr. Stockard (1904) reports his experience with a pair that laid four
sets of eggs, 19 eggs in all, and all in the same nest.
Bendire (1895) says that “the eggs are white, mostly ovate in shape;
the shell is fine grained and rather dull looking, with little or
no gloss, resembling in this respect the eggs of Lewis’s woodpecker
more than those of the red-headed species.” I have seen eggs that are
elliptical-ovate in shape, and decidedly glossy; eggs that have been
incubated for some time become more glossy than when first laid. The
measurements of 50 eggs average 25.06 by 18.78 millimeters; the eggs
showing the four extremes measure =27.00= by 19.79, 25.15 by =23.62=,
=23.00= by 18.70, and 23.11 by =16.76= millimeters.
_Young._--The period of incubation is said to be about 14 days. Both
sexes assist in this and in the feeding and care of the young. In the
more northern portions of its range, probably only one brood is reared
in a season, but in the South this woodpecker is said to raise two and
sometimes three broods.
Public-domain text, read in full here on John Shaqi.
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