21. Dr . Richard Wrangham, a primatologist at Harvard, cites the example of the red colobus monkey . 22. The black colobus monkey is one of five recognised species in the " Colobus " genus. 23. The park is a sanctuary for colobus monkeys , chimpanzees, and many birds such as hornbills and turacos. 24. The black colobus monkey is listed under Appendix II of CITES, which restricts international trade of the species. 25. Olive colobus monkeys are found in small groups containing multiple breeding males, several females, and their infants. 26. The male red colobus monkeys group together and place themselves between predators and the group's females and juveniles. 27. Inside these tents, primates like colobus monkeys and red-capped mangabeys can play and climb on twisting vines. 28. The black colobus monkey is found in Equatorial Guinea, south west Cameroon and central and north-western Gabon. 29. The zoo s animal collection was expanded to include mandrills, a colobus monkey , and two African lion cubs. 30. Gestation is about 6 months for colobus monkeys and one female has about 1 2 new-born every two years.
