Thai National Parks

Reptiles of Thailand

Species of Thailand

Keeled rat snake

Thai: งูสิงหางดำ, ngu sing hang damm

Binomial name: Ptyas carinata, Albert Charles Lewis Günther, 1858

Commonly known as the Keeled Rat Snake, Ptyas carinata is a species of colubrid snake. It is found in Indonesia, Myanmar, Malaysia, Thailand, Philippines, Cambodia, Vietnam and Singapore.

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Scientific classification

Ptyas carinata

Common names

  • German: Gekielte Rattenschlange
  • English: Keeled rat snake
  • Thai:
    • งูสิงหางดำ, ngu sing hang damm
    • งูสิงดง, ngu sing dong
    • งูเห่าดง, ngu haow dong


  • Ptyas carinata, Van Stanley Bartholomew Wallach et al. (2014)
  • Ptyas carinata, Patrick David & Indraneil Das (2004)
  • Zaocys carinatus, Larry Lee Grismer et al. (2002)
  • Zaocys carinatus, Rooijen & Rooijen (2002)
  • Ptyas carinatus, Rudolf Malkmus et al. (2002)
  • Ptyas carinatus, Merel J. Cox et al. (1998)
  • Zaocys carinatus, Ulrich Manthey & Wolfgang Grossmann (1997)
  • Ptyas carinatus, Patrick David & Gernot Vogel (1996)
  • Zaocys carinatus, Alice Georgie Cruickshank Grandison (1978)
  • Zaocys carinatus, Malcolm Arthur Smith (1943)
  • Ptyas carinatus, Frank Wall (1923)
  • Zaocys carinatus, George Albert Boulenger (1893)
  • Zaocys tenasserimensis, William Lutley Sclater (1891)
  • Zaocys (Zapyrus) carinatus, Oskar Boettger (1887)
  • Zaocys carinatus, Albert Charles Lewis Günther (1864)
  • Coryphodon carinatus, Albert Charles Lewis Günther (1858)
  • Ptyas carinatus, Albert Charles Lewis Günther (1858)
  • Zaocys carinatus, Albert Charles Lewis Günther (1858)

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)

Body/tail pattern

Body/tail pattern

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Distribution map of Keeled rat snake, Ptyas carinata in Thailand

Range map of Ptyas carinata 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.

Contribute or get help with ID

Please help us improving our species range maps. To add a new location to the range map we need a clear image of the specimen you have encountered. No problem if you do not know the species, we will do our best to identify it for you.

For the location, please provide the district name or the national park/ wildlife sanctuary name.

Please post your images to our Thai Species Identification Help group on Facebook.