Also known as the Silvery lutung or Silvery langur. Mainly arboreal, living in coastal, mangrove, and riverine forests in Peninsular Malaysia, Sumatra, and Borneo. The young are born with orange fur and with white hairless skin on the face, hands, and feet. The skin rapidly changes to the dark adult colour but the fur does not reach the adult pattern for three to five months after birth.
Found across Borneo and Sumatra as well as in parts of the south-western Malay peninsula, the Natuna Islands, and other nearby islands. It inhabits mangrove swamps and nearby forest regions, and generally avoids traveling far from coasts or rivers.