The Eurasian bittern, another reed bed bird, will consume rails, as will grey herons. The American bittern ("Botaurus lentiginosus") is a species of wading bird in the heron family. The little bittern is crepuscular, skulking and normally solitary. These wetlands are the southernmost nesting site for the American bittern. The least bittern is an elusive bird. The original meaning of Purley was a riverside field inhabited by snipe or bittern. Migrant birds stopping at Long Lake include the state-endangered least bittern and Virginia rail. The American bittern is protected under the United States Migratory Bird Treaty Act of 1918. The least bittern forms a superspecies with the little bittern and yellow bittern. Another association to the bunyip is the shy Australasian bittern ("Botaurus poiciloptilus"). Carl Linnaeus described the little bittern in 1766. Also American bittern, canvasback and Ross's goose. Browne even kept a captive bittern to discover how its "boom" was produced. It is hoped to attract bittern and other wildlife.