Lateral prolongations at the base of the bill in the form of two elevated, compressed tubercles: bill red: legs ochre-yellow.
Anas spectabilis, Temm. Man. d'Orn. torn. ii. p. 851. King Duck, Mont. Orn. Diet. Bew. Brit. Birds, vol. ii. p. 310. King Eider, Selb. Illust. vol. ii. p. 343. pl. 71. (Trachea,) Linn. Trans, vol. xv. pl. 15. f. c & d.
Entire length twenty-four inches six lines: length of the bill (from the forehead) one inch two lines, (from the gape) two inches seven lines; of the tarsus one inch ten lines and a half; of the tail four inches three lines; of the wing eleven inches six lines: height of the frontal tubercles one inch six lines; breadth of ditto one inch. Faun. Bor. Am.
(Male). Contour of the frontal tubercles, under eyelid, edge of the upper one, and two converging bands on the throat, meeting on the chin, rich velvet-black: crown, occiput, and nape, fine bluish gray: cheeks and ear-coverts glossy pea-green, passing into dull white towards the chin and neck; a whitish line from the corners of the eye down the sides of the occiput reaching to the nape; lower part of the neck, and breast, white tinged with buff; upper part of the back, wing-coverts, and a large space on each side of the rump, pure white: scapulars, secondaries, curved tertiaries, lower part of the back, rump, tail-coverts, belly, and abdomen, deep black: greater quills and tail blackish brown: bill vermilion red; frontal tubercles, and base of the lower mandible, orange: legs ochre-yellow. (Female). " Exactly resembling the female Eider, except that the frontal plates of the upper mandible, instead of being almost horizontal, are more nearly vertical. The bill is also shorter than that of the Eider." Faun. Bor. Am. (Young male). " Head and neck dusky yellowish gray, crowded with blackish spots: upper plumage mostly pitch-black, with yellowish brown edgings: breast and Hanks yellowish brown, spotted and barred with black; belly the same colours intimately mixed: bill as in the female." Faun. Bor. Am. (Egg). Greenish yellow white: long. diam. two inches nine lines; trans, diam. one inch nine lines.
A native of high northern latitudes, but met with occasionally in small numbers in some of the Scotch Islands. Mr Bullock is stated by Montagu to have found it breeding in Papa Westra, one of the Orkneys, in the latter end of June. The nest was on a rock impending the sea. Eggs six in number, covered, as in the case of the last species, with the down of the female. Very rare on the English coast, but has been killed at Aldborough in Suffolk.