Thai National Parks

Reptiles of Thailand

Species of Thailand

Dog-toothed cat snake

Thai: งูแส้หางม้า, ngu sae hang ma

Binomial name: Boiga cynodon, Heinrich Boie, 1827

Boiga cynodon, commonly known as the dog-toothed cat snake, is a nocturnal species of rear-fanged colubrid snake endemic to Asia.


It is a large snake, reaching more than 2 m (6½ feet) in total length. The front teeth of the upper jaw and the lower jaw are strongly enlarged.

The body is slender and laterally compressed. Dorsally it is tannish with reddish-brown or dark brown crossbands. There is a dark streak behind the eye on each side of the head. The venter is whitish, heavily marbled with dark brown.

The smooth dorsal scales are arranged in 23 or 25 rows at midbody, and those in the vertebral row are strongly enlarged. Ventrals 248-290; subcaudals 114-165.


It feeds mainly upon small birds and bird eggs, but may also take lizards and small mammals.


Boiga cynodon is an oviparous species, with sexually mature females laying eggs, 6-12 per clutch.

Geographic range

  • Bangladesh
  • Cambodia
  • India (Assam)
  • Indonesia (Bali, Bangka, Belitung, Borneo, Flores, Java, Kalimantan, Mentawai Archipelago, Nias, Riau Archipelago, Sumatra, Sumbawa)
  • Laos
  • Malaysia (Malaya and East Malaysia), Pulau Tioman
  • Myanmar (formerly called Burma)
  • Philippine Islands (Basilan, Culion, Dinagat, Leyte, Luzon, Mindanao, Palawan, Panay, Polillo, Sibutu, Sulu Archipelago)
  • Singapore
  • Thailand

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Scientific classification

Boiga cynodon

Common names

  • German: Hundezahn-Katzennatter
  • English:
    • Dog-toothed cat snake
    • Large blunt-headed tree snake
  • Thai: งูแส้หางม้า, ngu sae hang ma


  • Boiga cynodon, Van Stanley Bartholomew Wallach et al. (2014)
  • Boiga cynodon, Maren Gaulke (2011)
  • Boiga cynodon, Chris Mattison (2007)
  • Boiga cynodon, Tanya Chan-Ard et al. (1999)
  • Boiga cynodon, Merel J. Cox et al. (1998)
  • Boiga cynodon, Ulrich Manthey & Wolfgang Grossmann (1997)
  • Boiga cynodon, Robert Mertens (1930)
  • Boiga cynodon, Thomas Barbour (1912)
  • Dipsadomorphus cynodon, George Albert Boulenger (1896)
  • Pareas waandersi, Pieter Bleeker (1860)
  • Eudipsas cynodon, Albert Charles Lewis Günther (1858)
  • Opetiodon cynodon, André Marie Constant Duméril & Gabriel Bibron (1854)
  • Eudipsas cynodon, Leopold Fitzinger (1843)
  • Dipsas cynodon, Friedrich Boie (1827)

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)

Distribution map of Dog-toothed cat snake, Boiga cynodon in Thailand

Range map of Boiga cynodon 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.

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