This territorial curassow has a polygynous mating system (2), particularly when resources are abundant and less time needs to be spent on defending territories and more time can be invested in mating with multiple females (8). Unlike most gamebirds, curassows nest off the ground, with both males and females helping in the nest’s construction (4). Females lay between one and three eggs per clutch (9), with egg-laying having been recorded in May and June in Venezuela (2) (9), during the early rains, and in May in Colombia (2). This brood size is very small compared to those of many ground-nesting gamebirds (4).
Like other curassows, the yellow-knobbed curassow feeds mainly on the ground, although it will fly up into the trees if threatened (4). Foraging usually takes place in small family groups, but flocks of up to 25 birds may occur during the dry season (2) (9).