Plate CCII. Male, Female, and Young in winter.
Adult in summer with the bill black, the feet greyish-blue, the
anterior edge of the tarsus, upper surface of toes, and part of the
webs, pale livid flesh-colour; fore part and sides of head, throat,
and sides of neck light bluish-grey, fore part and sides of head
darker; upper parts glossy bluish-black, tinged with green anteriorly,
and shaded with brown posteriorly; on the fore part of the back two
longitudinal bands of transverse white bars, the feathers being tipped
with that colour; the scapulars, excepting the outer, marked in the
same manner with transverse rows of rather large square spots; most of
the wing-coverts with two roundish spots of white near the end; quills
blackish-brown, tinged with grey externally, paler on the inner webs;
tail blackish-brown, of eighteen feathers; fore neck to the length of
six and a half inches purplish-black, ending angularly below, and with
a transverse interrupted band of linear-white spots near the upper
part, beyond which the sides of the neck blackish-brown, with several
longitudinal white streaks, formed by the edges of the feather; on the
lower part of the neck a broad space occupied by their longitudinal
dusky and white streaks; lower parts pure white, except a dusky
longitudinal band on the sides under the wing. Young in winter with
the bill bluish-grey, on the ridge dusky; upper part of head and hind
neck dark greyish-brown, sides of head greyish-white, minutely
streaked with brown, sides of neck also streaked, its fore part
faintly mottled; lower parts white, the sides and lower tail-coverts
greyish-brown; upper parts blackish-brown, the feathers broadly edged
with pale grey, quills and tail brownish-black.
_Male_, 29, 39-1/2.
The young range throughout the interior and along the coast as far as
Texas, in autumn and winter. Adult in full plumage very rare. Breeds
in high latitudes. Columbia River.
Colymbus arcticus, Bonap. Syn. p. 420.
Colymbus arcticus, Black-throated Diver, Swains. & Rich. F.
Bor. Amer. v. ii. p. 475.
Black-throated Diver, Nutt. Man. v. ii. p. 517.
Black-throated Diver, Colymbus arcticus, Aud. Orn. Biog. v.
iv. p. 345.