The Gray Langur was formerly considered a single species (S. entellus). However several former subspecies are now elevated to full species including the Nepal Gray Langur seen here. Langurs are highly social and have tails longer than their bodies. Canon PowerShot SX50 HS.
Reference:
Gray langur. (2016, April 16). In Wikipedia, The Free Encyclopedia. Retrieved 16:04, April 29, 2016, from https://en.wikipedia.org/w/index.php?title=Gray_langur&oldid=715470272