Critically Endangered
Eastern black crested gibbon
Nomascus nasutus
Eastern black crested gibbon is a primate in the family Hylobatidae (order Primates) — Nomascus nasutus, recorded as Critically Endangered.
Appearance
The eastern black crested gibbon is classified as separate from other crested gibbons based on molecular data, fur coloration, and differences in vocal communication.
Range and habitat
In 2002 a small population was rediscovered by two FFI biologists in a karst forest of Trùng Khánh District, Cao Bằng Province, in northeast Vietnam. The species was endemic to Vietnam until 2006 when they were also found in a small forest in Guangxi Province of China, that is adjacent to Trung Khanh forests. This status has resulted from deforestation of its habitat, encroachment, and poaching.
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
In crisis
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 2005 it was estimated that this population in Vietnam side was about 35–37 individuals. The eastern black crested gibbon is one of the rarest and most critically endangered primates in the world.
Eastern black crested gibbon is Critically Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.
Sources
Written for this catalog from the English Wikipedia article on Eastern black crested gibbon, Wikidata item Q1195996. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.
