| Previously known as: | Hylobates concolor |
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| Kingdom | Animalia |
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| Phylum | Chordata |
| Class | Mammalia |
| Order | Primates |
| Family | Hylobatidae |
| Genus | Nomascus (1) |
| Size | Head-body length: 45 - 64 cm (2) |
| Weight | 5.7 kg (2) |
Classified as Critically Endangered (CR) on the IUCN Red List (1), and listed on Appendix I of CITES (3). Four subspecies are currently recognised, all of which are classified as Critically Endangered: the Tonkin black-crested gibbon (Nomascus concolor concolor), West Yunnan black-crested gibbon (N. c. furvogaster), Central Yunnan black-crested gibbon (N. c. jingdongensis), and Laotian black-crested gibbon (N. c. lu) (1).
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