The pig-tailed langur[1] (Simias concolor), monotypic in the Simias genus, is a great Old-World monkey native to several small islands off Sumatra, Indonesia.
- The body length of pig-tailed langur ranges from 49 to 55 cm in males and 46 to 55 cm in females. The average weight is about 8.7 kg for males and 7.1 kg for females.
- The tail length of pig-tailed langur varies between 14 and 15 cm. There are two color variants for Simias concolor, a dark gray phase and a creamy beige phase, with the dark gray phase being the most common.
- The creamy cream phase is found in about 1 in 4 people. The limbs are the same length, and the tail is relatively short compared to other primate species of the Colobinae subfamily.
- Adult pig-tailed langurs have black faces and small, turned-up noses.
- The dark phase coat of Simias concolor is dark brown with slightly mottled hairs on the nape, shoulders, and upper back.
- This species’ tail is short and hairless, except for a small amount of hair on the tip of the tail.
