Thai National Parks

Reptiles of Thailand

Species of Thailand

Siamese cat snake

Thai: งูแส้หางม้าเทา, ngu sae hang ma thao

Binomial name: Boiga siamensis, Wirot Nutaphand, 1971

The gray cat snake (Boiga siamensis), also known as eyed cat snake or Siamese cat snake is a species of catsnake found in northeastern India, Bangladesh, Myanmar, Cambodia, Thailand, Malaysia, and Vietnam.

Description

The Siamese cat snake resembles the dog-toothed snake but it occupies a different geographical range. It is a large snake, reaching almost 2 m (6 1⁄2 ft) in total length. Colours are greyish-brown with black crossbars that are most distinct interiorly. The head is dark brown with a dark streak from behind the eye to the first body crossbar that is broken just beyond the last supralabial. The chin and throat are white, the ventrals white to light brown.

Behavior and venom

Mostly nocturnal, it is a potentially aggressive snake. It is a rear fanged venom snake but there are not known casualties registered. In 2014 while a study for the Prayao forest department (Thailand), herpetologist Frank Cuesta was bitten by a juvenile. The bite caused a very large edema along the entire arm and had to be treated at a hospital for over a month.

Geographic range

India, Bangladesh, Myanmar, Cambodia, Thailand, Malaysia, and Vietnam.

Habitat

These snakes are found in forest-hills and plains and can be found up to 1, 700m. They are arboreal but can be found near water too.

Diet

This snake feeds on, birds, and eggs.

Reproduction

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

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Scientific classification

Kingdom
Animalia
Phylum
Chordata
Subphylum
Vertebrata
Class
Reptilia
Order
Squamata
Suborder
Serpentes
Family
Colubridae
Genus
Boiga
Species
Boiga siamensis

Common names

  • German: Graue Katzennatter
  • English:
    • Siamese cat snake
    • Gray cat snake
    • Eyed cat snake
  • Thai: งูแส้หางม้าเทา, ngu sae hang ma thao

Subspecies

  • Boiga siamensis naranjita, Frank Cuesta, 2015

    Range: Found only in the provinces of Nan and Phayao in the North of Thailand.

Synonyms

  • Boiga siamensis, Van Stanley Bartholomew Wallach et al. (2014)
  • Boiga ocellata, Romulus Whitaker & Ashok Captain (2004)
  • Boiga ocellata, Patrick David et al. (2004)
  • Boiga ocellata, Jarujin Nabhitabhata et al. (2000)
  • Boiga ocellata, Tanya Chan-Ard et al. (1999)
  • Boiga ocellata, Merel J. Cox et al. (1998)
  • Boiga ocellata, C. Kroon (1973)
  • Boiga siamensis, Wirot Nutaphand (1971)
Siamese cat snake

Siamese cat snake

Creative Commons Attribution-ShareAlike 4.0 International Thai National Parks

Boiga siamensis

Boiga siamensis

Creative Commons Attribution-ShareAlike 4.0 International Thai National Parks

Boiga siamensis

Boiga siamensis

Creative Commons Attribution-ShareAlike 4.0 International Thai National Parks

Boiga siamensis (juvenile)

Boiga siamensis (juvenile)

Creative Commons Attribution-ShareAlike 4.0 International Thai National Parks

Boiga siamensis (juvenile)

Boiga siamensis (juvenile)

Creative Commons Attribution-ShareAlike 4.0 International Thai National Parks

Siamese cat snake (juvenile)

Siamese cat snake (juvenile)

Creative Commons Attribution-ShareAlike 4.0 International Thai National Parks

Boiga siamensis

Boiga siamensis

Creative Commons Attribution-ShareAlike 3.0 Unported Thai National Parks

Distribution map of Siamese cat snake, Boiga siamensis in Thailand
  • Ban Dan Lan Hoi District, Sukhothai
  • Ban Lat District, Phetchaburi
  • Bang Saphan District, Prachuap Khiri Khan
  • Huai Kha Khaeng Wildlife Sanctuary
  • Kaeng Krachan District, Phetchaburi
  • Kaeng Krachan National Park
  • Kui Buri National Park
  • Mueang Chiang Mai District, Chiang Mai
  • Mueang Kanchanaburi District, Kanchanaburi
  • Mueang Phetchaburi District, Phetchaburi
  • Nakhon Thai District, Phitsanulok
  • Pai District, Mae Hong Son
  • Ramkhamhaeng National Park
  • Sakaerat Environmental Research Station
  • Thung Yai Naresuan Wildlife Sanctuary
  • Umphang District, Tak

Range map of Boiga siamensis 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 and Parinya Pawangkhanant for their help with many range data.

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