Life histories of North American shore birds, Part 1 (of 2) — John Shaqi
Life histories of North American shore birds, Part 1 (of 2)Bent, Arthur Cleveland
Science
Life histories of North American shore birds, Part 1 (of 2)
Bent, Arthur Cleveland
Birds -- Behavior; Shore birds -- North America
_Plumages._--The general color pattern of the downy young northern
phalarope is similar to that of the red phalarope, but it differs in
some details and the colors are lighter and more yellowish above. The
colors vary from "ochraceous tawny," on the crown and rump, to "antimony
yellow," on the rest of the upper parts, and to "Naples yellow" on the
throat. The underparts are more extensively grayish white than in the
preceding species and there is considerable whitish between the black
stripes on the back. There is more black in the crown, which is nearly
surrounded by it, and the black terminates in a point on the nape. A
very narrow black line runs from the bill to the eye; and there is a
black auricular patch. The central black stripe on the back is broad,
but the side stripes are narrow, and there are extensive black patches
on thighs and wings.
I have seen no specimens showing the progress of development of the
juvenal plumage. In the full juvenal plumage in August, the crown,
occiput, and a space around the eye are black, the former faintly
mottled with buff; the remainder of the head, throat, and under parts
are white, more or less suffused with "light cinnamon drab" and gray on
the sides of the neck, breast, and flanks; the feathers of the back and
scapulars are brownish black, broadly edged with bright "ochraceous
tawny," which gradually fades; some of the tertials are narrowly edged
with the same color; the median and inner greater wing coverts and the
central tail feathers are narrowly edged with pale buff or white.
A partial molt of the body plumage in September and October produces the
first winter plumage, which is like that of the winter adult, except
that the juvenal wings are retained. The sexes are alike in the juvenal
and all winter plumages. A partial prenuptial molt, from February to
June, involving the body plumage, some of the wing coverts and scapulars
and the tail, produces the first nuptial plumage, in which the sexes
differ, and which is nearly, if not quite, indistinguishable from that
of the adult.
Adults have a complete molt from July to October and an incomplete molt
from February to June, similar to that of the young bird, producing the
distinct and well-known winter and nuptial plumages.
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