Mitred leaf monkey (scientific name: Presbytis melalophos) is endemic to the island of Sumatra, Indonesia, and the small island of Pulau Pini in the Batu Archipelago, just off the coast of Sumatra . It is classified as Endangered (EN) on the IUCN Red List and listed on Appendix II of CITES.
The population of Mitred leaf monkey is threatened by the rise of poaching for pet trade and food. Moreover, Indonesia is a major supplier by plywood and palm oil. This has resulted in the significant habitat loss for Mitred leaf monkey.
The mitred leaf monkey is conserved by national law in Indonesia and is listed under Appendix II of the Convention on International Trade in Endangered Species (CITES). It is found in five protected areas in Indonesia: Berbak National Park, Bukit Barisan National Park, Bukit Sebelah Protection Forest, Kerinci-Seblat National Park, and Way Kambas National Park .These measures may help to protect these species from illegal poaching and the threat of habitat loss.