Pig-tailed langur

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Pig-tailed langur[1]
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Family: Cercopithecidae
Subfamily: Colobinae
Genus: Simias
Miller, 1903
Species: S. concolor
Binomial name
Simias concolor
Miller, 1903
Pig-tailed Langur area.png
Pig-tailed Langur range

The pig-tailed langur (Simias concolor, monotypic in genus Simias) is a large, rather heavily built Old World monkey, which is adapted to climbing with its long arms. Its fur is black-brown, and its hairless face is also black. It is the only monkey in the subfamily Colobinae to have a relatively short tail; the tail is only slightly furred and is only 15 cm long. The short nose is pointed upward. The pig-tailed langur reaches a full grown length of approximately 50 cm and a weight of 7 kg. Traditionally, it has been placed in the genus Nasalis together with the proboscis monkey - a treatment still preferred by some.[3]

This primate lives only on the Mentawai Islands, where it is known as Simakobou in Siberut and Simasepsep on the southern islands of Sipura, North Pagai, and South Pagai. Two of these islands, North- and South-Pagai, are its main range. It is a diurnal and arboreal rain forest dweller, rarely coming to the ground. It lives in small groups (3 to 8 animals), which consist of a male, one or more females, and their offspring. Its diet consists mainly of leaves and, to a lesser extent, fruits and berries. Nothing of its reproduction is known.

The species is considered to be one of "The World's 25 Most Endangered Primates."[4]


  • Genus Simias
    • Pig-tailed langur, Simias concolor
      • Simias concolor concolor
      • Simias concolor siberu


  1. ^ Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M, eds. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press. p. 175. OCLC 62265494. ISBN 0-801-88221-4. 
  2. ^ Whittaker, D. & Mittermeier, R. A. (2008). Simias concolor. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 4 January 2009.
  3. ^ Bradon-Jones, D., A. A. Eudey, T. Geissmann, C. P. Groves, D. J. Melnick, J. C. Morales, M. Shekelle, and C. B. Stewart. 2004. Asian primate classification. International Journal of Primatology. 23: 97-164.
  4. ^ Mittermeier, R.A.; Wallis, J.; Rylands, A.B.; Ganzhorn, J.U.; Oates, J.F.; Williamson, E.A.; Palacios, E.; Heymann, E.W.; Kierulff, M.C.M.; Long Yongcheng; Supriatna, J.; Roos, C.; Walker, S.; Cortés-Ortiz, L.; Schwitzer, C., eds. (2009). "Primates in Peril: The World's 25 Most Endangered Primates 2008–2010" (PDF). Illustrated by S.D. Nash. Arlington, VA.: IUCN/SSC Primate Specialist Group (PSG), International Primatological Society (IPS), and Conservation International (CI). pp. 1–92. ISBN 978-1-934151-34-1.