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Reptiles of Thailand

Species of Thailand

Large-eyed pit viper

Thai: งูเขียวหางไหม้ตาโต, ngu khieow hang mai dtaa dtoo

Binomial name: Trimeresurus macrops, Eugen Kramer, 1977

Trimeresurus macrops is a venomous pit viper species endemic to Southeast Asia. No subspecies are currently recognized. Common names include large-eyed pitviper and green pit viper.


It can be distinguished from other green pit vipers by the relatively large size of its eyes, which is especially noticeable in adult specimens, and to which the specific name, macrops, refers.

Scalation includes 21 rows of dorsal scales at midbody, 160-174/161-175 ventral scales in males/females, 62-74/49-63 subcaudal scales in males/females, and 9-12 supralabial scales.

Geographic range

It is found in Southeast Asia in northern Cambodia, Laos, Thailand, and southern Vietnam. The type locality given is "Bangkok, Thailand".

This article uses material from Wikipedia released under the Creative Commons Attribution-Share-Alike Licence 3.0. Eventual photos shown in this page may or may not be from Wikipedia, please see the license details for photos in photo by-lines.

Scientific classification

Trimeresurus macrops

Common names

  • German: Grossaugen-Bambusotter
  • English:
    • Large-eyed pit viper
    • Kramer's pit viper
    • Big-eyed green pit viper
  • Thai: งูเขียวหางไหม้ตาโต, ngu khieow hang mai dtaa dtoo


  • Cryptelytrops macrops, Tanya Chan-Ard et al. (2015)
  • Trimeresurus macrops, Van Stanley Bartholomew Wallach et al. (2014)
  • Trimeresurus (Trimeresurus) macrops, Patrick David et al. (2011)
  • Trimeresurus macrops, Andreas Gumprecht et al. (2004)
  • Cryptelytrops macrops, Anita Malhotra & Roger Stephen Thorpe (2004)
  • Trimeresurus macrops, Roy W. McDiarmid, Jonathan A. Campbell & T'Shaka A. Touré (1999)
  • Trimeresurus macrops, Merel J. Cox et al. (1998)
  • Trimeresurus macrops, Kenneth R. G. Welch (1994)
  • Trimeresurus macrops, Eugen Kramer (1977)

Free photo downloads

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  • Trimeresurus macrops
  • Trimeresurus macrops
  • Trimeresurus macrops

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)

Distribution map of Large-eyed pit viper, Trimeresurus macrops in Thailand

Range map of Trimeresurus macrops 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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