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Photo: Andry M Taufan · CC BY-SA 4.0 (May be cropped or resized)
Presbytis thomasi
Diet
Primarily folivorous
Habitat
Forest, including Gunung Leuser National Park
Range
Endemic to northern Sumatra
Thomas's langur, also known as the North Sumatran leaf monkey, is endemic to northern Sumatra, not living to the south and east of Lake Toba and the Alas and Wampu rivers. Its native names are reungkah in Acehnese and kedih in Alas. It can be found in Gunung Leuser National Park, where substantial populations exist at Ketambe and Bukit Lawang. It is primarily folivorous, and threatened by habitat loss (Wikipedia, general species account).