Species of Thailand

Clouded monitor

Varanus nebulosus, John Edward Gray, 1931

(In Thai: ตะกวด, ta kuwad)

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 Empagusia along with the Bengal monitor, the Dumeril's 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
    • แลน, laan
    • กวดพร้าว, kuwad praow


  • 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)


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Varanus nebulosus
Varanus nebulosus
Varanus nebulosus
Varanus nebulosus
Varanus nebulosus (juvenile) - Kaeng Krachan NP
Clouded monitor (juvenile)
Varanus nebulosus (juvenile)

Range Map

Distribution map of Clouded monitor, Varanus nebulosus in Thailand
  • Ao Phang-Nga National Park
  • Ban Lat District, Phetchaburi
  • Betong District, Yala
  • Cha-Am District, Phetchaburi
  • Doi Suthep - Pui National Park
  • Hua Hin District, Prachuap Khiri Khan
  • Huai Kha Khaeng Wildlife Sanctuary
  • Kaeng Krachan National Park
  • Khao Phanom Bencha National Park
  • Khao Soi Dao Wildlife Sanctuary
  • Khao Sok National Park
  • Khao Yai National Park
  • Khao Yoi District, Phetchaburi
  • Khlong Nakha Wildlife Sanctuary
  • Ko Kut District, Trat
  • Ko Lanta District, Krabi
  • Ko Lanta National Park
  • Ko Samui District, Surat Thani
  • Kui Buri National Park
  • Mueang Krabi District, Krabi
  • Nam Nao National Park
  • Pang Sida National Park
  • Phon Sawan District, Nakhon Phanom
  • Phu Khiao Wildlife Sanctuary
  • Phu Luang Wildlife Sanctuary
  • Phuket Province
  • Sawang Daen Din District, Sakon Nakhon
  • Surin Islands
  • Tarutao National Marine Park
  • Tha Mai District, Chanthaburi
  • Tha Yang District, Phetchaburi
  • Thalang District, Phuket
  • Thale Ban National Park
  • Thung Yai Naresuan Wildlife Sanctuary
  • Yan Ta Khao District, Trang
Range map of Varanus nebulosus in Thailand