Thai National Parks

Species of Thailand

Dog-toothed cat snake

Boiga cynodon

Heinrich Boie, 1827

In Thai: งูแส้หางม้า, ngu sae hang ma

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 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 33 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 Bats.


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

Geographic range

  • Indonesia (Bali, Bangka, Belitung, Borneo, Flores, Java, Kalimantan, Mentawai Archipelago, Nias, Riau Archipelago, Sumatra, Sumbawa)
  • Malaysia (Malaya and East Malaysia), Pulau Tioman
  • Philippine Islands (Basilan, Culion, Dinagat, Leyte, Luzon, Mindanao, Bohol, Palawan, Panay, Polillo, Samar,

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)

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)


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Boiga cynodon (melanistic) - Hala-Bala Wildlife Sanctuary
Boiga cynodon - Hala-Bala Wildlife Sanctuary
Boiga cynodon (subadult) - Saba Yoi District, Songkla
Boiga cynodon
Boiga cynodon global range

Range Map

Distribution map of Dog-toothed cat snake, Boiga cynodon in Thailand
  • Ao Luek District, Krabi
  • Ban Na San District, Surat Thani
  • Bang Khan District, Nakhon Si Thammarat
  • Bang Lang National Park
  • Betong District, Yala
  • Cha-Am District, Phetchaburi
  • Don Sak District, Surat Thani
  • Hala-Bala Wildlife Sanctuary
  • Hua Hin District, Prachuap Khiri Khan
  • Kaeng Krachan National Park
  • Kantang District, Trang
  • Kathu District, Phuket
  • Khanom District, Nakhon Si Thammarat
  • Khao Chong
  • Khao Lak - Lam Ru National Park
  • Khao Phra - Bang Khram Wildlife Sanctuary
  • Khao Pu - Khao Ya National Park
  • Khao Sok National Park
  • Khao Tha Petch Wildlife Conservation and Developme
  • Khiri Rat Nikhom District, Surat Thani
  • Khlong Saeng Wildlife Sanctuary
  • Khok Pho District, Pattani
  • Ko Lanta District, Krabi
  • Ko Samui District, Surat Thani
  • Kui Buri National Park
  • La-ngu District, Satun
  • Lang Suan District, Chumphon
  • Mueang Chumphon District, Chumphon
  • Mueang Krabi District, Krabi
  • Mueang Nakhon Si Thammarat District, Nakhon Si Thammarat
  • Mueang Phang Nga District, Phang Nga
  • Mueang Phuket District, Phuket
  • Mueang Songkhla District, Songkhla
  • Phuket Province
  • Saba Yoi District, Songkhla
  • Sadao District, Songkhla
  • Sri Phang-nga National Park
  • Su-ngai Kolok District, Narathiwat
  • Tha Sala District, Nakhon Si Thammarat
  • Thai Mueang District, Phang Nga
  • Thale Ban National Park
  • Than To District, Yala
  • Than To Waterfall Forest Park
  • Thung Song District, Nakhon Si Thammarat
  • Ton Nga-Chang Wildlife Sanctuary
  • Waeng District, Narathiwat
  • Yong Waterfall National Park
Range map of Boiga cynodon in Thailand