They are omnivores whose diet includes primarily fruits and seeds, sometimes feeding on small animals. They live in social groups of four to twelve individuals, but occasionally groups as large as 95 individuals have been recorded
Sooty mangabeys (Cercocebus atys)
The sooty mangabey (Cercocebus atys) is an Old World monkey found in forests from Senegal east to Ghana. While overall rated as Vulnerable, the eastern race lunulatus, also known as the white-crowned, white-naped or white-collared mangabey (leading to easy confusion with the collared mangabey), is considered Endangered by the IUCN.
There are two distinctive subspecies of this mangabey, and it is possible they should be considered separate species. Both were formerly considered subspecies of a widespreadCercocebus torquatus
Cercocebus atys atys (west of the Sassandra River)
White-collared (or White-crowned) mangabey, Cercocebus atys lunulatus (east of the Sassandra River).
Researchers: Fredy Quintero and Christof Neumann