The black-crested Sumatran langur (Trachypithecus auratus) is a species of monkey native to the island of Sumatra in Indonesia. They are also known as the black-crested leaf monkey or the Sumatran surili.
They have a distinctive black crest of fur on the top of their head, with the rest of their body covered in golden-brown fur. They have a white patch on their chin and golden-brown eyes.
These langurs are arboreal, meaning they live primarily in trees, and are found in a variety of forested habitats, from lowland tropical rainforests to montane forests at elevations up to 2,000 meters.
Black-crested Sumatran langurs are mainly herbivorous, feeding on leaves, fruits, flowers, and occasionally insects. They are social animals that live in groups of up to ten individuals, led by a dominant male.
This species is currently listed as endangered by the International Union for Conservation of Nature (IUCN) due to habitat loss from deforestation and hunting for their meat and fur. Conservation efforts include protecting their habitats and captive-breeding programs.
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