Subspecies P. badius badius. These guys were going crazy with alarm calls because they were being hunted by chimps.
Pennant's Red Colobus, Bioko subspecies (Procolobus p. pennantii)
The Olive Colobus or Van Beneden's Colobus (Procolobus verus) is a species of primate in the Cercopithecidae family. It is found in Ivory Coast, Ghana, Guinea, Liberia, Nigeria, Sierra Leone, Togo, and possibly Benin. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical swamps. It is threatened by habitat loss.