Thai National Parks

Species of Thailand

Dusky leaf monkey

Trachypithecus obscurus, Reid, 1837

(In Thai: ค่างแว่นถิ่นใต้)

The dusky leaf monkey, spectacled langur, or spectacled leaf monkey (Trachypithecus obscurus) is a species of primate in the Cercopithecidae family. It is found in Malaysia, Burma, and Thailand.

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Scientific classification

Trachypithecus obscurus

Common names

  • German: Südlicher Brillenlangur
  • English:
    • Dusky langur
    • Dusky leaf monkey
    • Spectacled langur
    • Spectacled leaf monkey
  • Spanish:
    • Langur obscuro
    • Langur de anteojos
  • French: Semnopithèque obscur
  • Italian:
    • Langur dagli occhiali
    • Presbite dagli occhiali
  • Dutch: Brillangoer
  • Swedish: Rökgrå bladapa
  • Thai: ค่างแว่นถิ่นใต้


  • Trachypithecus obscurus carbo, Michael Rogers Oldfield Thomas & Robert Charles Wroughton

    Common name: 1909

  • Trachypithecus obscurus flavicauda, Daniel Giraud Elliot, 1910

  • Trachypithecus obscurus halonifer, Theodore Edward Cantor, 1845

  • Trachypithecus obscurus obscurus, Reid, 1837

  • Trachypithecus obscurus sanctorum, Daniel Giraud Elliot, 1910

  • Trachypithecus obscurus seimundi, Frederick Nutter Chasen, 1940

  • Trachypithecus obscurus styx, Cecil Boden Kloss, 1911


  • Trachypithecus corax, Reginald Innes Pocock (1934)
  • Trachypithecus ruhei, Knottnerus Meyer (1933)
  • Trachypithecus smithii, Cecil Boden Kloss (1916)
  • Trachypithecus corvus, Gerrit Smith Miller, Jr (1913)
  • Trachypithecus leucomystax, Hermann Schlegel & Salomon Müller (1841)

Conservation status

Near Threatened (IUCN3.1)

Near Threatened (IUCN3.1)


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Trachypithecus obscurus - Kaeng Krachan NP
Dusky leaf monkey - Kaeng Krachan NP
Dusky leaf monkey - Kaeng Krachan NP
Dusky leaf monkey - Kaeng Krachan NP
Dusky leaf monkey - Kaeng Krachan NP
Trachypithecus obscurus - Kaeng Krachan NP
Dusky leaf monkey with baby
Dusky leaf monkey juveniles - Kaeng Krachan NP

Range Map

Distribution map of Dusky leaf monkey, Trachypithecus obscurus in Thailand
  • Ang Thong National Marine Park
  • Hala-Bala Wildlife Sanctuary
  • Kaeng Krachan National Park
  • Khao Luang National Park
  • Khao Nang Phanthurat Forest Park
  • Khao Sam Roi Yot National Park
  • Khao Sok National Park
  • Khlong Saeng Wildlife Sanctuary
  • Ko Lanta District, Krabi
  • Ko Lanta National Park
  • Kui Buri National Park
  • Mueang Krabi District, Krabi
  • Mueang Prachuap Khiri Khan District, Prachuap Khiri Khan
  • Mueang Satun District, Satun
  • Similan Islands
  • Tarutao National Marine Park
Range map of Trachypithecus obscurus in Thailand