The red-bellied guenon is a social animal which lives in troops containing between 5 and 30 individuals (1) (6). Guenon troops generally comprise a single dominant adult male, a number of adult females and their young (6).
Although the breeding biology of this species is not fully understood, it is likely to be similar to that of other guenon species, which typically mate during July to September and give birth to a single young after a gestation period of around six months (6). The young guenon clings to the underside of its mother as they travel through the forest, with their tails entwined (6).
Guenons are diurnal primates, mainly active in the early morning or late afternoon (6). The red-bellied guenon feeds predominantly on fruits and seeds, but it also eats leaves, the quantity of which increases when fruit is in short supply, and supplements its diet with small birds, reptiles and insects (6) (7).