What is "lutung"

n. Any of a group of Old World monkeys, making up the genus ''Trachypithecus'', with a rather slim build and a long tail

The lutungs are a group of Old World monkeys and make up the entirety of the genus Trachypithecus. Their range is split into two parts; one part is much of southeast Asia (northeast India, southern China, Taiwan, Borneo, Thailand, Java and Bali), the other part is extreme southern India and Sri Lanka. The greater part of India has lutungs. Most of the species in this genus can be referred to as lutungs, as langurs, or as leaf monkeys.

The name "lutung" comes from the Sundanese language and means blackness; it is preferred by some authors because it distinguishes the genus from the "true" langurs of the Indian subcontinent.