Thai National Parks

Species of Thailand

Green tree snake

Gonyosoma coeruleum, Shuo Liu, Mian Hou, Ye Htet Lwin, Qiaoyan Wang & Dingqi Rao, 1854

(In Thai: งูทางมะพร้าวเขียว)

Gonyosoma prasinum (green trinket snake, green bush rat snake or green ratsnake) is a species of colubrid snake found in Asia.


Rostral a little broader than deep, just visible from above; suture between the internasals a little shorter than that between the prefrontals; frontal as long as its distance from the end of the snout, shorter than the parietals; loreal square or longer than deep; one or two preoculars; temporals 1+2 or 2+2; upper labials 9, fourth, fifth, and sixth entering the eye; 5 lower labials in contact with the anterior chin-shields, which are as long as the posterior or a little longer. Scales in 19 rows, the 9 to 11 middle rows feebly keeled m the adult, smooth in the young. Ventrals with a lateral keel, 198 to 206; anal entire or divided; subcaudals 100–107. Uniform bright green above; upper lip and lower surface yellowish or greenish white. Total length 3 feet: tail 9 inches.


Its habitat ranges include Bangladesh, India (Darjeeling, Assam, Arunachal Pradesh, Burma (also known as Myanmar), northern Thailand, west Malaysia, Laos, Vietnam, China (Yunnan, Guizhou, Hainan) and Philippines.

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Scientific classification

Gonyosoma coeruleum

Common names

  • German:
    • Grüne Strauchnatter
    • Grüne Spitzkopfnatter
  • English:
    • Green tree snake
    • Green mountain racer
    • Green tree racer
    • Green bush rat snake
    • Green ratsnake
    • Green trinket snake
  • Thai: งูทางมะพร้าวเขียว


  • Gonyosoma prasina, Tanya Chan-Ard et al. (2015)
  • Gonyosoma prasinum, Xin Chen et al. (2014)
  • Gonyosoma prasinus, Chen et al. (2014)
  • Rhynchophis prasinus, Van Stanley Bartholomew Wallach et al. (2014)
  • Rhadinophis prasina, Hussam Zaher et al. (2012)
  • Gonyosoma prasinum, Nguyen Van Sang et al. (2009)
  • Elaphe prasina, Bryan L. Stuart & Harold Heatwole (2008)
  • Rhadinophis prasina, Frank T. Burbrink (2007)
  • Elaphe prasina, Indraneil Das & Norsham S. Yaakob (2007)
  • Gonyosoma prasinum, Thomas Ziegler et al. (2007)


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Gonyosoma coeruleum - Kaeng Krachan National Park
Gonyosoma coeruleum - Khao Sok National Park

Copyright Khao Sok Snakes

Gonyosoma coeruleum - Khao Sok National Park
Gonyosoma coeruleum (juvenile) - Doi Inthanon National Park
Gonyosoma coeruleum (juvenile) - Doi Inthanon National Park
Gonyosoma coeruleum (juvenile) - Doi Inthanon National Park

Range Map

Distribution map of Green tree snake, Gonyosoma coeruleum in Thailand
  • Betong District, Yala
  • Bo Kluea District, Nan
  • Chae Son National Park
  • Chiang Dao District, Chiang Mai
  • Chiang Dao Wildlife Sanctuary
  • Doi Ang Khang
  • Doi Inthanon National Park
  • Doi Pha Hom Pok National Park
  • Doi Phu Kha National Park
  • Doi Saket District, Chiang Mai
  • Doi Suthep - Pui National Park
  • Huai Kha Khaeng Wildlife Sanctuary
  • Huai Nam Dang National Park
  • Kaeng Krachan National Park
  • Khao Sok National Park
  • Khao Yai National Park
  • Khlong Wang Chao National Park
  • Khun Chae National Park
  • Mae Taeng District, Chiang Mai
  • Mae Wong National Park
  • Mueang Mae Hong Son District, Mae Hong Son
  • Mueang Tak District, Tak
  • Nanthaburi National Park
  • Pha Daeng National Park
  • Phu Hin Rong Kla National Park
  • Phu Khiao Wildlife Sanctuary
  • Phu Kradueng District, Loei
  • Phu Luang District, Loei
  • Phu Luang Wildlife Sanctuary
  • Phu Soi Dao National Park
  • Pua District, Nan
  • Suan Phueng District, Ratchaburi
  • Tha Sae District, Chumphon
  • Thung Yai Naresuan Wildlife Sanctuary
  • Umphang District, Tak
Range map of Gonyosoma coeruleum in Thailand