Description
English: Photo of Nomascus nasutus hainanus
Date 26 September 2009
Source Own work
Author User:Anna Frodesiak https://commons.wikimedia.org/wiki/User:Anna_Frodesiak
Source: https://commons.wikimedia.org/wiki/File:Nomascus_nasutus_hainanus.jpg

The eastern black crested gibbon (Nomascus nasutus), also known as the Cao-vit black crested gibbon or the Cao-vit crested gibbon, is a species of gibbon from southeast China and north Vietnam. From the 1960s until the 2000s there had been no confirmed sightings of the eastern black crested gibbon and it was thought to be possibly extinct. In 2002 a small population was rediscovered in the Trùng Khánh District, Cao Bằng Province, in northeast Vietnam. The eastern black crested gibbon is one of the rarest and most critically endangered primates in the world. This status has resulted from deforestation of its habitat, encroachment, and poaching. It is considered to be one of "The World's 25 Most Endangered Primates." Order: Primates, Family: Hylobatidae.