A variety of barks and chirps given by all members signal their sovereignty over the territory. Females tend to stay with the same group throughout their lives while males may more from group to group. Acrobats in the trees, red colobus span wide gaps by leaping from one slim branch to another or by using the elasticity of a branch to catapult themselves between trees. Red colobus eat fruits, seeds, and foliage in two concentrated feeding sessions in the morning and evening. The red colobus superspecies is listed as one of Africa's ten most endangered monkeys, with the Bioko subspecies being one of the most endangered.
All colobus are easy targets for hunters because they are noisy and slow.
Bioko's red colobus has been severely affected by hunting and somewhat by habitat loss. Probably far fewer than 10,000 animals survive on the southern tip of Bioko.