Like other Crax, the male Yellow-knobbed Curassow’s plumage is predominantly black, with a white ventral region and a broad tip to the tail, while the female differs solely in lacking the yellow cere of the male, and in having a barred breast and upper belly. The crest feathers curl forward over the bill. The species frequents lowland deciduous and evergreen forest, especially in gallery woodland, and has been recorded at elevations up to 1500 m, although it is usually found at much lower altitudes. The Yellow-knobbed Curassow is found only in northern Venezuela and in northeast Colombia, where its populations are in serious decline through hunting and agricultural development and expansion. Losses in Venezuela, which formerly supported the vast majority of the species’ overall population, have been especially severe.