Head and neck black, glossed with green; back and scapulars whitish, with undulating black lines; belly, flanks, and speculum on the wing, white; bill blue; legs ash-colour.
* Brit. Birds, vol. vi. pl. 147.
† I have followed Stephens and Selby in referring this species to the present genus, until its true situation be determined. It may be questioned, however, whether it be not more properly an Oidemia.
Anas Marila, Temm* Man, d'Orn. torn. ii. p. 865. Scaup Duck, Mont. Orn. Diet, & Supp. Bew. Brit. Birds, vol. 11. p. 339. Scaup Pochard, Selb. Illust. vol. ii. p. 354. pls. 66, & 66 *. (Trachea,) Linn. Trans, vol. iv. pl. 14. f. 3, & 4.
Entire length twenty inches: length of the bill (from the forehead) one inch ten lines, (from the gape) two inches three lines; of the tarsus one inch five lines and a half; of the tail two inches seven lines; from the carpus to the end of the wing eight inches six lines.
(Male). Head and upper part of the neck greenish black, with glossy reflections; lower part of the neck, and breast, pitch-black: upper part of the back, and scapulars, grayish white, with fine, distant, transverse, undulating, black lines: first three primaries, and greater wing-coverts, dusky; lesser coverts the same, but finely powdered with white; the rest of the primaries, and all the secondaries, white, with dusky tips, forming a bar across the wings when closed: rump, tail, and upper tail-coverts, deep brown, approaching to black: belly and flanks pure white, the latter slightly undulated with black: vent, and under tail-coverts, spotted with brown: bill pale grayish blue; the nail black: irides bright yellow: legs ash-gray; the membranes dusky. (Female). A broad, transverse band of yellowish white surrounding the base of the bill; rest of the head, and neck, chocolate-brown; lower part of the neck, breast, and rump, deep brown; back and scapulars dusky brown, with minute specks and close undulating lines of grayish white; flanks spotted and undulated with brown: irides dull yellow. (Young male). More or less similar to the adult female: some white feathers at the base of the bill; the black on the head and neck without gloss, and mixed with feathers of a dusky brown colour: the white on the back variegated with brown spots; and the undulating lines closer together than in the adult male: belly dirty white, spotted with gray; flanks spotted with dusky-brown. (Egg). Greenish yellow white: long. diam. two inches five lines; trans, diam. one inch eight lines and a half.
A regular winter visitant, and not uncommon at that season on most parts of the British coast. Occasionally met with inland on fresh waters. Retires in the Spring to high northern latitudes to breed. Food, marine plants and insects, fish, and molluscous animals. Obs. The Anas frce-nata of Sparraann* is the female of this species.