Thai National Parks

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Reptiles of Thailand

Species of Thailand

Clouded monitor

Thai: ตะกวด, ta kuwad

Binomial name: Varanus nebulosus, John Edward Gray, 1931

The clouded monitor (Varanus nebulosus) is a species of monitor lizard, native to Burma, Thailand and Indochina to West Malaysia, Singapore, Java, and Sumatra. They are excellent tree climbers. It belongs to the subgenus Euprepiosaurus along with the peach-throated monitor, the Ceram mangrove monitor and other monitor lizards. It had previously been listed as a subspecies of Varanus bengalensis by some herpetologists. It is a diurnal monitor.


Clouded monitors can, on occasion, grow up to 1.5 metres long.

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Scientific classification

Varanus nebulosus

Common names

  • German: Nebelwaran
  • English:
    • Clouded monitor
    • Southeast Asian monitor
  • Thai:
    • ตะกวด, ta kuwad
    • กวดพร้าว, kuwad praow
    • แลน, laan


  • Varanus (Empagusia) nebulosus, André Koch et al. (2013)
  • Varanus bengalensis nebulosus, Olivier S.G. Pauwels et al. (2003)
  • Varanus nebulosus, Larry Lee Grismer et al. (2002)
  • Varanus nebulosus, Hien et al. (2001)
  • Varanus bengalensis nebulosus, Ulrich Manthey & Wolfgang Grossmann (1997)
  • Varanus bengalensis vietnamensis, H.F. De Lisle (1996)
  • Varanus vietnamensis, Yang & Liu (1994)
  • Varanus bengalensis nebulosus, Alice Georgie Cruickshank Grandison (1972)
  • Varanus nebulosus, John Roscoe Hendrickson (1966)
  • Varanus bengalensis nebulosus, Robert Mertens (1942)
  • Varanus nebulosus, Nelly de Rooij (1915)
  • Varanus nebulosus, George Albert Boulenger (1885)
  • Varanus nebulosus, André Marie Constant Duméril & Gabriel Bibron (1836)
  • Monitor nebulosus, John Edward Gray (1831)
Distribution map of Clouded monitor, Varanus nebulosus in Thailand

Range map of Varanus nebulosus in Thailand

Important note; our range maps are based on limited data we have collected. The data is not necessarily accurate or complete.

Special thanks to Ton Smits, Parinya Pawangkhanant, Ian Dugdale and many others for their contribution for range data.

It is free to use this map on various media. See the creative common license terms by clicking "CC" icon below the map. But remember, again; the map may not be accurate or complete.

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