Cao-vit gibbon (Nomascus nasutus) female with young brachiating in rainforest, Cao Vit Gibbon Species and Habitat Conservation Area (CVGSHCA), Trung Khanh, Cao Bang Province, northern Vietnam. Critically endangered species, rediscovered in 2002, found only in northern Vietnam and the adjacent region of China, with a total population estimated at around 135 individuals. EDITORIAL USE ONLY. All uses require clearance.