a large, white-billed, blue-black woodpecker (Campephilus principalis) of SE U.S.: it is an endangered species
See ivory-billed woodpecker in American Heritage Dictionary 4
noun
A large, nearly extinct woodpecker (Campephilus principalis) of the southern United States and Cuba, having black plumage, white wing patches, an ivory-colored bill, and a bright red crest in the male. Also called ivorybill.