Males and females are mostly black with a white lower belly, vent area, and tips of the tail feathers.

[3] The yellow-knobbed curassow is found in northern Venezuela as far east as Sucre and Monagas states and in immediately adjacent northeastern Colombia.

[3] The yellow-knobbed curassow forages in small family groups, or in combined ones of up to 15 birds in the dry season.

It builds an oval nest of branches and lianas lined with leaves and grass and usually sites it in a tree and concealed by vines.

Male yellow-knobbed curassows sing a "bomb-dropping" descending whistle, sometimes combined with a wing-clapping display or booming.