Pig-tailed langur

The pig-tailed langur (Simias concolor) is a large Old World monkey and the only member of its genus, Simias. It is endemic to several small islands off the coast of Sumatra in Indonesia, the Mentawai Islands, where two subspecies occur: Simias concolor concolor on the southern islands of Sipora, North Pagai and South Pagai, and Simias concolor siberu on Siberut. The face is black, the fur black-brown, and the tail only about 15 centimetres long, which makes it the only monkey of the subfamily Colobinae with a relatively short tail. A full-grown animal is about 50 centimetres long and weighs about 7 kilograms, with males larger than females. It is a diurnal, arboreal rain forest dweller that eats leaves, flowers, fruits and occasionally insects, and it lives in groups of one male and several females. It is heavily hunted and has lost forest to commercial logging, so the IUCN assessed it as critically endangered in 2008 and it is on the list of the world's 25 most endangered primates.