资料来源 : Webster's Revised Unabridged Dictionary (1913)

Ivory-bill \I"vo*ry-bill`\, n. (Zo["o]l.)
   A large, handsome, North American woodpecker ({Campephilus
   principalis}), having a large, sharp, ivory-colored beak. Its
   general color is glossy black, with white secondaries, and a
   white dorsal stripe. The male has a large, scarlet crest. It
   is now rare, and found only in the Gulf States.