Black Snub-nosed Monkey (Rhinopithecus bieti) lives in mountain forests across Southeast Asia. It feeds on lichens and leaves. Its conservation status is Endangered.
Fascinating facts about the Black Snub-nosed Monkey
- The black-and-white snub-nosed monkey inhabits the highest elevations of any non-human primate, with some troops recorded at 4700 m above sea level. This altitude is far above the tree line, yet the monkeys move through coniferous and deciduous forests there. Their survival is underpinned by a unique mutation in their genome that raises resistance to low-oxygen conditions, allowing them to function where most mammals would falter.
- Only seventeen separate groups of black-and-white snub-nosed monkeys remain in the wild, together numbering fewer than 1 700 individuals across the remote Yun Range and adjacent Tibetan prefecture. Each troop claims a home range that can be as small as 20 km² or stretch to 135 km², depending on local food availability and terrain.
- Lichens form the cornerstone of the black-and-white snub-nosed monkey's diet, providing a reliable, year-round food source in the mountainous forests where they live. While most animals find lichens poisonous, these monkeys possess specialised digestive enzymes that break down the harmful bacteria, a capability likened to the rumen microbes of cattle.
- The monkey's coat is remarkably dense, forming a heavy insulating layer that keeps the animal warm when temperatures drop below freezing at its high-altitude homes. This thick pelage also shields the skin from the thin, icy air of the mountains. Newborn infants arrive covered in pure white fur, which gradually turns the characteristic grey-black as they mature. The colour pattern, with a white belly and facial centre, remains throughout life.
- Both adult and baby individuals display smooth, hairless lips that are a vivid pink, a feature not seen in other primates. The striking colour contrasts with the surrounding grey-black and white fur. In addition, the species completely lacks nasal bones, giving the face its distinctive short, "snub-nose" appearance. This skeletal trait is the basis of the common name.
Sources
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At a glance
RangeSoutheast Asia
HabitatMountain forests
DietLichens and leaves
About the Black Snub-nosed Monkey
In the mist-shrouded mountains of China's Yunnan province, the elusive black snub-nosed monkey navigates the treacherous terrain with an air of quiet confidence, its dark fur glistening with dew as it leaps effortlessly from tree to tree. With a curious gaze and an endearing propensity for mischief, this enigmatic primate weaves through the forest canopy, its very existence a testament to the resilience of life in one of the most fragile and threatened ecosystems on the planet. As it disappears into the swirling vapors, its soft, melodic calls echo through the valley, a haunting reminder of the beauty and fragility of this endangered species.
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