Birds habitat beaches, like gulls, loons, sandpipers, terns and pelicans. Flamingos, pelicans and herons inhabit the marshes. Isolated, uninhabited islands provide nesting sites for colonial nesting birds including pelicans, gulls and terns. Marine birds, such as herons, gannets, pelicans and boobies, feed on reef fish. Colonies of cormorants and pelicans are common. Winter residents include northern gannets, American white pelicans and common loons. The wet season also brings migratory birds such as ducks, geese and great white pelicans. Nearby is a small pond for black-necked swans, American white pelicans, and brown pelicans. Bird species are counted at 701, which include hummingbirds, pelicans and hawks. Immature birds are grey and lack the pink facial patch of immature white pelicans. They have predominantly pale plumage, the exceptions being the brown and Peruvian pelicans. The plumage of immature pelicans is darker than that of adults. Large numbers of these pelicans breed together in colonies. American white pelicans are common at Pyramid Lake. Occasionally, Dalmatian pelicans may mix in with colonies of great white pelicans.