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Dryas monkey
The Dryas monkey (''Cercopithecus dryas''), also known as Salonga monkey or ''ekele'', 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'' (the common name being 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 ''C. 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 numbers 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.〔
== Physical description ==
An adult male Dryas monkey is characterized by its black muzzle, white whiskers, and short, white facial beard. The dorsal surface of its body, along with the coronal crown, is a grayish chestnut color. This species also has white on the ventral side of its body, tail, the bottom portion of the limbs, and the buttocks. The upper portion of the limbs resembles a similar color to the rest of its body, being a dark-grey/black-brown color.〔Reiko Goodwin © ''All the World's Primates''(alltheworldsprimates.org) Downloaded 12/8/2011.〕
Adult females and offspring have smaller portions of their bodies that are white in color; the white color is not present around their shoulder areas or their buttocks. Another difference in coloration is present in the upper portion of the arms, which are lighter in color as compared to the males.〔 Body size varies from 40 to 55 cm, with a tail an additional 50–75 cm. Adults weigh between 4 and 7 kg, with marked sexual dimorphism.〔Burton,F. 1995. ''the Multimedia Guide to the Non-human Primates''. Prentice-Hall Canada Inc.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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