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, 391/2.
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.
486. 3. Colymbus septentrionalis, Linn. Red-throated Diver.
Plate CCII. Male in summer, Male in winter, Female, and Young.
Adult, in summer, with the bill bluish-black, the feet brownish-black, anterior part of tarsus, upper surface of toes, and part of webs, livid flesh-colour; fore part and sides of head, throat, and sides of neck, bluish-grey; fore part of neck rich brownish-red; hind part of head and hind neck longitudinally streaked with greenish-black and pure white, each feather black in the middle, with the sides white, the colours disposed in lines; upper parts in general brownish-black, tinged with green, more or less mottled with white, according to age, excepting the primary quills and the tail-feathers, of which there are twenty; lower parts pure white, excepting the feathers on the sides under the wings, some of those about the vent, and the lower tail-coverts, which are greyish-brown, with white margins and tips. Young, in winter, with the fore part of the neck white, or slightly mottled with red; all the feathers of the upper parts with two white spots near the end; tail-feathers edged and tipped with white. Young at first covered with dense elastic down, of a greyish-black colour, tinged with Brown.
Male, 19, 25. Female, 18, 24.
Not uncommon during winter, autumn, and early spring, from Maryland eastward. Breeds in Newfoundland, Labrador, and as far north as the Arctic Seas.
Colymbus septentrionalis, Bonap. Syn. p. 421.
Red-throated Diver, Colymbus septentrionalis, Swains. & Rich. F. Bor. Amer. v. ii. p. 476.
Red-throated Diver, Nutt. Man. v. ii. p. 519.
Red-throated Diver, Colymbus septentrionalis, Aud. Orn. Biog. v. iii. p. 20; v. v. p. 625.