American Oystercatcher (Haematopus palliatus)
The American Oystercatcher is a large, conspicuous shorebird, common in coastal salt marshes and along sand beaches throughout the central part of its range. One of the few birds to specialize on bivalve mollusks living in saltwater, this species is completely restricted to marine habitats. Two races breed in North America—the eastern nominate race along the Atlantic coast from southern Maine south, and a second race along the Pacific coast from northwestern Baja California south. While the eastern race has been studied extensively across its range both during winter and the breeding season, the biology of the western race is poorly known and this population may also be at risk both from coastal development and hybridization with the American Black Oystercatcher ( H. bachmani ). Eastern oystercatchers regularly winter in large flocks, from Virginia south along the Atlantic and Gulf coasts.