meaning they are frugivorous. Up to 65 species of fruit have been reported in their diet, primarily from canopy trees or lianas. Three quarters (75%) of the fruit eaten by the Guianan cock-of-the-rock at one study site were either black- or red-coloured fruit. In British Guiana, E. Thomas. Gilliard found papayas growing at the base of a huge rock. On top of the rock were perched females that were nesting. He found that no other papayas were growing in that part of the forest and speculated that the perched females ate papayas in the forest where they are native and dropped the seeds below where they were nesting. Small snakes, lizards, insects and frogs are occasionally found in its diet. By selectively feeding on nearby fruit trees and then defecating or regurgitating the seeds within the leks, these birds can actively influence the regeneration and succession of the forest habitat where they breed. Breeding Guianan cocks-of-the-rock breed early in the year, and the females lay their eggs around March, nesting in rocky areas. During the height of mating season, males gather in leks with multiple males defending a social display arena of much greater area than that of a lone male. The males each have their own area on the forest floor where they make their courts. The size of each court is about in diameter, and the next bird is often about away. The females and males live separately; only when it is time to mate do females fly over to observe and choose a male. When this occurs, the females tap the males from behind and insemination quickly follows. When females approach a lek, the males stand firmly and present themselves rigidly. Mating success is dependent on a variety of factors that range from the plumage exhibited by a male to the composition of the lek itself. In one study, the female Guianan cocks-of-the-rock displayed sexual selection based on sequential comparisons or threshold standards. The hens engaged in a “pool–comparison” tactic, meaning that females chose males of higher rank in courtship. Males of higher rank were those with more matings received from other females; the lower-ranking single males were ignored. The rankings were determined by where the courts were positioned in the lek: courts that were more centrally placed indicated more successful and higher-ranking males. The females in the study were individually observed to aggregate towards larger, more