449. 9. Larus leucopterus, Fabr. White-winged Silvery Gull.

Plate CCLXXXII. Adult and Young.

Bill stout, gamboge-yellow, with a spot of orange-red near the end of

the lower mandible; angle of the mouth and edges of eyelids

orange-red; feet pale flesh-colour; wings more than two inches longer

than the tail; plumage pure white, excepting the back and upper

surface of the wings, which are light greyish-blue; the tips of the

secondaries, the terminal third of the primaries, and the upper

tail-coverts, also white. Young in second plumage with the bill

yellow, tipped with black, the feet yellowish flesh-colour; plumage

yellowish-grey, marked on the head and neck with longitudinal streaks

of pale brown, on the back and wings with transverse undulations,

those on the tail much fainter; the first six quills destitute of

markings.

_Adult_, 26, 50.

During winter from New York to Nova Scotia. Not rare. Breeds on the

islands and peninsulas of the Arctic Seas.

Larus leucopterus, Bonap. Syn. p. 361.

Larus leucopterus, White-winged Silvery Gull, Swains. & Rich.

F. Bor. Amer. v. ii. p. 418.

White-winged Silvery Gull, Nutt. Man. v. ii. p. 305.

White-winged Silvery Gull, Larus leucopterus, Aud. Orn. Biog.

v. iii. p. 553.

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