Life histories of North American woodpeckersBent, Arthur Cleveland
Science
Life histories of North American woodpeckers
Bent, Arthur Cleveland
Birds -- North America; Woodpeckers -- North America
he was left alone again.
_Plumages._--The young are hatched naked but acquire the juvenal
plumage before leaving the nest. In three young males in my collection,
taken on June 20, August 4, and August 30, the upper parts are much
like those of the adult male, but the crown is more or less invaded
with scarlet or vermilion-tipped feathers, sometimes with only a few
scattered feathers and sometimes covering the whole crown and nape;
they are more heavily spotted on the breast and more heavily barred on
the belly than are the fall adults, and these markings are dark sepia,
instead of black, and less well defined than in adults; the bills are
smaller and weaker. Mr. Swarth (1904) says: “In the young female,
besides occupying a less extensive surface, the red is less intense
than in the male, and not as solid, that is there is always more or
less brown showing through. The red cap of the juvenile bird seems
to be worn but a short time, as a young female taken September 4 has
hardly a trace of it remaining.”
Apparently the juvenal plumage is molted, including the wings and tail,
late in August or September, when the first winter plumage, which is
practically indistinguishable from that of the adult, is acquired. Mr.
Swarth (1904) says of the molt of the adult:
The Arizona woodpecker commences to moult about the middle
of July, and by the first week in September the new plumage
is almost completely acquired. The plumage of the breast,
abdomen, and lower parts generally, seems to be the first
to be renewed, while the remiges, rectrices and feathers of
the interscapular region are the last to get their growth.
An old female shot on September 3 had practically completed
its moult, with the exception of the tail feathers, none of
which were over half an inch long; while several specimens
of both sexes, taken during the last two weeks in August,
are in nearly perfect autumnal plumage, except for some
small patches of old feathers in the interscapular region.
Fall specimens are considerably darker on the back than
birds taken during the spring and summer, but the change is
undoubtedly due to fading of the plumage, as birds taken in
the late winter and early spring, show not the slightest
traces of moult, and a series of birds taken from February
to July, show plainly the gradual change of coloration.
Singularly enough the pileum and back of the neck does not
seem to fade as the dorsum does, and consequently, while
birds in fresh fall plumage are of practically uniform
coloration on the upper parts, specimens taken in the late
spring and summer have the head and neck abruptly darker
than the back and exposed portion of the wings. * * * Of
twenty-four specimens from this region [Arizona] four show
more or less traces of white bars across the rump; one of
these is a male in nuptial plumage, one a male in freshly
Public-domain text, read in full here on John Shaqi.
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