While very little is known about the specific biology of the Ayres black uakari, it is likely similar to other uakari monkeys, which feed primarily upon unripe seeds, although it is likely that this primate will also supplement its diet with fruit pulp, leaves and insects (5). This adaptation has allowed uakaris to inhabit a number of forest types that other primates cannot exploit on a continual basis (9). Uakaris may travel up to six kilometres each day in large, flexible groups, but forage individually (4) (5) (8). Although normally found in aggregations of around 10 to 30 individuals, groups of up to 100 may be observed in areas of high food abundance (3) (5). Group members communicate using a wide array of vocalizations, including screams and hissing, and visual signals, such as tail-wagging (4). Mixed sex, multiple male and multiple female groups have all been observed, but dominance hierarchies, which have been observed in related species, have not yet been observed for the Ayres black uakari (4) (8) (9).
There is currently no information on the breeding biology of the Ayres black uakari; however, birthing in the closely related black-headed uakari (C. hosomi) coincides with the onset of the rainy season, a period in which fruit productivity peaks. Uakaris are typically polygynous, and a single young is born every two years (3).