A group of Proboscis monkeys (Nasalis larvatus) hang out in a tree on the edge of Sekonyer river, Tanjung Puting National Park, West Kalimantan, Indonesia. Living only on the island of Borneo (Kalimantan). Their numbers have plummeted in the last 50 years and they are currently endangered.
Photo by Daniel Murdiyarso/CIFOR
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