Gray langur Semnopithecus, also called Hanuman langur, is an Old World monkey native to the Indian subcontinent. Initially only one species, Semnopithecus entellus, was recognized, but since 2001, additional species have been added and currently eight species are well established.
They are fairly widespread and inhabit forests, open woodland and also urban areas on the Indian subcontinent. Most species are found at low to moderate altitudes, but the Nepal gray langur and Kashmir gray langur occur up to 4,000 m 13,000 ft in the Himalayas.
Langurs are largely gray some more yellowish, with a black face and ears. Their tails, at 69 to 102 cm 27 to 40 in are always longer than their bodies. The average weight of gray langurs is 18 kg 40 lb in the males and 11 kg 24 lb in the females.
Langurs mostly walk on all fours and spend half their time on the ground and the other half in the trees. They are mainly herbivores.
In the wild, langurs are preyed upon by leopards, dholes and tigers, and also other carnivores such as wolves, jackals, black bears and pythons. Harsh barks are made by adult males whenever they spot a predator and this serves as an alarm to other herbivores in the area.
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