Black-crested gibbon  (Nomascus concolor)

Classified as Endangered (EN) on the IUCN Red List 2006 (1), and listed on Appendix I of CITES (3).Subspecies: Tonkin black-crested gibbon (Nomascus concolor concolor) classified as Endangered (EN A1cd, C2a); West Yunnan black-crested gibbon (N. c. furvogaster) Critically Endangered (CR A2cd, B2a); Central Yunnan black-crested gibbon (N. c. jingdongensis) Critically Endangered (CR C2b); Laotian black-crested gibbon (N. c. lu) Endangered (EN A1c) (1); Hainan black-crested gibbon (N. c. hainanus) is Critically Endangered (EN), numbering fewer than 20 individuals (9).