40 years Females continually have a sexual swelling. They, like humans and unlike any other non-human primate, do not have an estrus cycle. Habitat Primary and secondary tropical lowland rainforest south of the Zaire river. Diet Fruit, leaves, stems, shoots, honey. Foraging groups are also made up of males and females.
Females are more likely to leave their natal group than males, who stay in their mother's group.
Groups tend to be more stable than those of P. troglodytes , perhaps due to plentiful food sources. 1200-2400m Behavior Diurnal, arboreal, and terrestrial. Sleep in nests built in trees. Limited tool use. Male and female dominance hierarchies, however the alpha female is dominant over the alpha male, unlike any other great ape.