(Procnias alba), a bird of the family Cotingidae of the order Passeriformes. The body of the bellbird is about 25 cm long. The male is white and the female is greenish. At the base of his beak the male has a bare, black, muscular caruncle. When the male makes a melodious bell-like call, the caruncle, which possibly acts as a resonator, becomes noticeably longer. Bellbirds are found in the mountain forests of the Guianas.