Alaska Seabird Information Series BLACK GUILLEMOT Cepphus grylle.

Black Guillemot (Cepphus grylle) Science Article 1

abstract

The Black Guillemot (Cepphus grylle) is a striking bird with almost entirely black breeding plumage, a bright, white patch on the upper wing and spotless, white underwings. Its plumage is set off with bright red legs and feet, a slender black bill, and a coral red mouth-lining. The most similar North American species is the Pigeon Guillemot (Cepphus colomba) and the two species may be seen together in the northern Bering Sea. In any plumage, the Pigeon Guillemot may be distinguished by dusky-gray underwings and a broad, black wedge in the white wing patch

U.S. Fish & Wildlife Service, U.S. Fish & Wildlife Service, Alaska, 2006

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