Yetis and humans aside, the highest living primate is the Yunnan (or black) snub-nosed monkey, which lives on the Tibetan Plateau at altitudes of up to 4,700m.
The survival of the species on the roof of the world is no doubt aided by its dark fur, which efficiently absorbs heat from the sun.
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Counter-intuitively, these mountaineering monkeys move to the highest elevations during the winter. The drop in temperature seems to be offset by an increase in sunlight, which melts fresh snow quicker to expose the lichens and foliage on which they feed.
Fewer than 2,000 individuals now remain, and they are vulnerable to becoming caught in snares set for deer.
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