Life histories of North American woodpeckersBent, Arthur Cleveland
Science
Life histories of North American woodpeckers
Bent, Arthur Cleveland
Birds -- North America; Woodpeckers -- North America
_Eggs._--The pileated woodpecker lays ordinarily from three to five
eggs; Audubon (1842) claims to have found six. The eggs vary from
ovate, the commonest shape, to elliptical-ovate; some are even quite
pointed. They are a brilliant china-white and usually decidedly glossy.
The measurements of 52 eggs average 32.90 by 24.72 millimeters; the
eggs showing the four extremes measure =35.70= by =27.00=, =30.22= by
22.35, and 29.30 by =22.00= millimeters.
_Young._--Bendire (1895) says that “an egg is deposited daily, and
incubation begins occasionally before the set is completed, and lasts
about eighteen days, both sexes assisting in this duty, as well as
in caring for the young. Like all Woodpeckers, the Pileated are very
devoted parents, and the young follow them for some weeks after leaving
the nest, until fully capable of caring for themselves. Only one brood
is raised in a season.”
_Plumages._--I have seen no small nestlings of this species, but they
are probably hatched naked and blind, like all other woodpeckers; the
juvenal plumage is evidently acquired before the young bird leaves the
nest.
The young male, in juvenal plumage, is much like the adult male in
general appearance, but the body plumage is softer, less firm, and
rather lighter and more sooty in color; the tips of the primaries have
dull-white narrow margins, which soon wear away; the red of the head
is duller, paler, and more restricted; on the fore half of the crown
and the malar region, the feathers are basally grayish brown, the red
showing only on the tips of most of the feathers, producing a mixed
color effect. The young female is similar to the young male but with
even less red in the head; the forehead and most of the crown are
grayish brown, which invades the red posterior portion of the crown;
and there is no red in the malar region. Audubon (1842) says that the
bill of the young bird is considerably longer than that of the adult.
The juvenal plumage is apparently worn for only a short time, during
the summer and early fall; I have not been able to detect it beyond
August; this is followed by a prolonged molt into a first winter
plumage, which is scarcely distinguishable from that of the adult.
Adults have a complete molt between June and September.
_Food._--The food of the southern pileated woodpecker is not
essentially different from that of the other races of the species, with
due allowance for the difference in environment. Prof. F. E. L. Beal
(1895) says: “Six stomachs, collected by Dr. B. H. Warren on the St.
Johns River in Florida, contained numerous palmetto ants (_Camponotus
escuriens_), and remains of other ants, several larvae of a Prionid
beetle (_Orthosoma brunnea_), numerous builder ants (_Crematogaster
lineolata_), one larva of _Xylotrechus_, and one pupa of the white ant
(_Termes_).”
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