| Previously known as: | Trachypithecus francoisi poliocephalus |
|---|
| Kingdom | Animalia |
|---|---|
| Phylum | Chordata |
| Class | Mammalia |
| Order | Primates |
| Family | Cercopithecidae |
| Genus | Trachypithecus (1) |
| Size |
Male head-and-body length: 55 – 62 cm (2) Female head-and-body length: 47 – 55 cm (2) Male tail length: 82 – 89 cm (2) Female tail length: 77 – 82 cm (2) Male weight: 8 – 9.5 kg (2) Female weight: 6.7 – 8 kg (2) |
The white-headed langur is classified as Critically Endangered (CR) on the IUCN Red List. There are two subspecies. The Cat Ba langur, (T. p. poliocephalus) is classified as Critically Endangered (CR) and is less commonly referred to as the Cat Ba hooded black langur, golden-headed langur, golden-headed hooded langur or Tonkin hooded black langur. The white-headed black langur or white-headed hooded langur (T. p. leucocephalus) is also classified as Critically Endangered (CR) on the IUCN Red List (1).