Blue-billed curassow  (Crax alberti)

The blue-billed curassow is the most threatened cracid species in the world and amongst the most endangered of all birds (4). This large, mainly black species is the only curassow with a distinctive blue cere and wattles, earning the bird its common name (2) (5). The male is black with a white vent and tip to the tail, and the feathers on the crest are distinctively curled. Females are black with black-and-white crest feathers, and fine white barring on the wings and tail (2). A rare barred variety of females has been recorded on the northern slope of the Santa Marta Mountains, which also has black-and-white barring on its breast and upper belly, as well as more white plumage on its crest (5). The lower belly and undertail of females are a rufous colour (2).