Thai National Parks

Species of Thailand

Khasi keelback

Hebius khasiensis, George Albert Boulenger, 1890

(In Thai: งูลายสาบภูเขาสีน้ำตาล, ngu lai saap phukhao see namdtan)

Amphiesma khasiense, commonly known as the Khasi Hills keelback, is a species of colubrid snake endemic to Asia.

Geographic range

It is found in parts of China (Tibet, Yunnan), India (primarily in the province of Assam), Laos, Myanmar, Thailand and Vietnam.


It is a reddish brown snake with a white transverse bar running across the supralabial scales.

The dorsal scales are in 19 rows, rather strongly keeled, except for the smooth outer row. The ventrals number 150-154, the subcaudals 80-100. The anal plate is divided.

Adults are about 60 cm (23½ in.) total length, of which about 19 cm (7½ in.) is tail.


The Khasi Hills keelback's nutritional intake consists primarily of toads.

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Scientific classification

Hebius khasiensis

Common names

  • German: Khasi Hills Gebirgswassernatter
  • English:
    • Khasi keelback
    • Khasi Hills keelback
    • Khasi Mountain keelback
  • Thai:
    • งูลายสาบภูเขาสีน้ำตาล, ngu lai saap phukhao see namdtan
    • งูลายสาบภูเขาอินเดีย, ngu lai saap phukhao India


  • Amphiesma khasiense, Tanya Chan-Ard et al. (2015)
  • Amphiesma khasiense, Van Stanley Bartholomew Wallach et al. (2014)
  • Hebius khasiense, Peng Guo et al. (2014)
  • Amphiesma cf. khasiense, Larry Lee Grismer et al. (2007)
  • Amphiesma khasiense, Thomas Ziegler et al. (2006)
  • Amphiesma khasiensis, R. C. Sharma (2004)
  • Amphiesma khasiensis, Indraneil Das (1996)
  • Paranatrix modesta, Mahendra (1984)
  • Amphiesma khasiensis, E. V. Malnate (1960)
  • Natrix khasiensis, Malcolm Arthur Smith (1943)


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hebius-khasiensis - Doi Phu Kha National Park
hebius-khasiensis - Phu Kradueng National Park
hebius-khasiensis - Phu Kradueng National Park

Range Map

Distribution map of Khasi keelback, Hebius khasiensis in Thailand
  • Chae Son National Park
  • Chom Thong District, Chiang Mai
  • Doi Inthanon National Park
  • Doi Phu Kha National Park
  • Doi Saket District, Chiang Mai
  • Doi Suthep - Pui National Park
  • Huai Nam Dang National Park
  • Kalayani Wattana District, Chiang Mai
  • Khlong Wang Chao National Park
  • Lan Sang National Park
  • Mae Chaem District, Chiang Mai
  • Mae On District, Chiang Mai
  • Mae Rim District, Chiang Mai
  • Mae Sariang District, Mae Hong Son
  • Mae Taeng District, Chiang Mai
  • Mae Takhrai National Park
  • Mae Tho National Park
  • Mae Wang District, Chiang Mai
  • Mae Wang National Park
  • Mueang Chiang Rai District, Chiang Rai
  • Nam Nao National Park
  • Namtok Pha Charoen National Park
  • Omkoi District, Chiang Mai
  • Pha Daeng National Park
  • Phu Hin Rong Kla National Park
  • Phu Khiao Wildlife Sanctuary
  • Phu Kradueng National Park
  • Phu Luang Wildlife Sanctuary
  • Samoeng District, Chiang Mai
  • Umphang District, Tak
  • Umphang Wildlife Sanctuary
  • Wiang Pa Pao District, Chiang Rai
Range map of Hebius khasiensis in Thailand