The Dryas monkey (Cercopithecus dryas), also known as Salonga monkey or ntolu, is a little-known species of guenon found only in the Congo Basin, restricted to the left bank of the Congo River. It is now established that the animals previously classified as Cercopithecus salongo (common name Zaire Diana monkey) were in fact Dryas monkeys. Some older sources treat the Dryas monkey as a subspecies of the Diana monkey and classify it as Cercopithecus diana dryas, but it is geographically isolated from any known Diana monkey population.
While the Dryas monkey formerly was considered data deficient, recent evidence suggests it is very rare and its total population possibly number less than 200 individuals. Consequently, its status was changed to critically endangered in the 2008 IUCN Red List.. Along with being listed by the IUCN this species is also listed on Appendix II of CITES.
Read more about Dryas Monkey: Life History, Conservation
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