White Headed Langur
White Headed Langur is associated with forests on limestone (karst) hills. The caves found in this habitat are thought to offer protection from predators and temperature extremes but, if accessible to people, this habitat is also where human hunters capture or kill sleeping langurs. Confined to Cat Ba Island, in Ha Long Bay off the northeastern cost of Viet Nam. There it is further restricted to about a 100 km2 area of occupancy, mostly inside Cat Ba National Park. The current total population as of August 2010 is 64 individuals.