Males are black with white cheek whiskers that have a more woolly appearance than the Northern white-cheeked gibbon. Females are yellowish-brown and the crown color ranges from dark brown to black, they are very similar in appearance to the Northern white-cheeked gibbon with no known consistent colour variations between the species.
Found in Central Lao and Central Vietnam.
HABITAT AND ECOLOGY
The Southern white-cheeked gibbon prefers primary lowland forest, tall primary tropical broadleaf and karst forest. There has been little research done on this species, but diets and social organization are likely similar to the other crested gibbons.
The main threat to this species is hunting, predominantly for the pet trade, and to a lesser extent for traditional medicine and local consumption. Additionally they are threatened by habitat fragmentation, especially in Vietnam.
STATUS AND CONSERVATION
The species is listed in the 2007 Vietnam Red Data Book as 'Endangered' and is protected by law under Decree 32/2001 ND-CP:1B.
CITES Appendix I - this species is threatened with extinction and international trade is permitted only in exceptional circumstances.