25- 30 individuals per km . Seeds are eaten from different plants in the forest, and leaves are eaten from relatively uncommon deciduous trees. However, they eat mature leaves heavily when seeds and young leaves are scarce. For instance, a group of colobus satanas studied in Gabon contained 5 adult females and 2 adult males. The female that left the group was seen in a neighboring group.
Territorial aggressiveness consists of vocal and physical display in males.
Infants are not very different from the parents. Allomothering is relatively uncommon. Specific information about Reproduction and Parental Care were not found.