The Black Oystercatcher (Haematopus bachmani) is a large shorebird, weighing between 500 and 700 g, present year-round along most of the Pacific coast of North America. Entirely black with a long red bill, pink legs and feet, and yellow eyes, Black Oystercatchers are conspicuous and distinct in appearance from other shorebirds. During the breeding season, pairs defend territories along gravel or rocky coastlines, where they nest just above the high tideline and feed on mussels and limpets in the intertidal zone. Territories are often abandoned in the winter, when flocks of more than a hundred birds can form.

Reference

Andres BA, Falxa GA: Black Oystercatcher (Haematopus bachmani). In: The Birds of North America Online. Edited by Poole A. Ithaca: Cornell Lab of Ornithology; 1995.