Nyungwe Forest boasts thirteen primate species including chimpanzees and Ruwenzori colobus arboreal monkeys ; the Ruwenzori colobus move in groups of up to 400 individuals , the largest troop size of any primate in Africa .
Nyungwe Forest has thirteen primate species including chimpanzees and Ruwenzori colobus arboreal monkeys . The Ruwenzori colobus move in groups of up to 400 , the largest troop size of any primate in Africa .