The female Guianan cock-of-the-rock breeds in the early months of the year and, on average, lays her eggs around March. The females choose a mate by flying down to the ground and pecking the male on his rump. The male then turns around and the mating takes place almost immediately. During the height of the mating season, males engage in competitive displays in lek, which is a complex courting behaviour that is done to attract females. Males and females live separately except when the females choose a mate. The mating success varies based on multiple factors, ranging from the plumage exhibited by a male to the composition of the lek itself. There is speculation that the male-to-male competition is an important factor in lek formation and breeding. The main predators of the Guianan cock-of-the-rock are harpy eagles and black-and-white hawk-eagles.