Venomous Snakes in Thailand (List by Species)

Here is the start of a venomous snakes in Thailand list for those of you that are concerned about what you might run into in the wild or under the water. Most of the ocean snakes are assumed deadly, so do not get bitten by any snake while diving.

Though most colubrids (colubridae) have been found to have venom in some amount and strength, we will only include them on this list if envenomation has caused fairly significant reactions in the form of tissue damage or other problems for the person bitten. If you, or someone you know has been bitten by a snake in Thailand and had complications arise from the bite, would you have them write me email so I can take down their account of the incident? Thanks much!

Venomous Terrestrial (Land) Snakes

Boiga dendrophila – mangrove cat-eyed snake
Bungarus candidus – banded krait
Bungarus fasciatus – Malayan krait (blue krait)
Bungarus flaviceps – red-headed krait
Bungarus multicinctus – many-banded krait
Calliophis bivirgatus – blue coral snake
Calliophis gracilis – spotted coral snake
Calliophis macclellandi
Calliophis maculiceps – Small spotted coral snake
Calloselasma rhodostoma – Malayan pit viper
Daboia russelii – Russell’s viper
Naja kaouthia – monocled / monocellate cobra
Naja naja – Indian cobra / spectacled cobra
Naja siamensis – Indochinese spitting cobra
Naja sumatrana – equatorial spitting cobra
Ophiophagus hannah – king cobra
Ovophis monticola – mountain pit viper
Rhabdophis nigrocinctus – green keelback
Rhabdophis subminiatus – red-necked keelback
Trimeresurus albolabris – white-lipped pit viper
Trimeresurus kanburiensis – Kanburi pit viper
Trimeresurus macrops – large-eyed bamboo pit viper
Trimeresurus popeorum – Pope’s pit viper
Trimeresurus puniceus – flat-nosed pit viper (ashy pit viper)
Trimeresurus purpureomaculatus – Mangrove pit viper / Shore viper
Trimeresurus sumatranus – Sumatran pit viper
Trimeresurus venustus – beautiful pit viper
Tropidolaemus wagleri – Wagler’s pit viper
Trimeresurus gumprechti – Gumprech’s viper
Trimeresurus vogeli – Vogel’s viper

Venomous Sea Snakes

Acalyptophis peronii – potentially deadly, no fatalities or envenomation reported
Astrotia stokesii – potentially deadly, largest of the sea snakes, venom not well studied.
Enhydrina schistosa – numerous human fatalities. Image here.
Hydrophis cantorus – potentially deadly, very few envenomations, and no fatalities reported.
Hydrophis cyanocinctus – numerous envenomations and fatalities.
Hydrophis gracilis – potentially deadly, no bites to humans.
Hydrophis lapemoides – deadly, some have been envenomated and died as a result of bites from this snake.
Hydrophis ornatus – rare, potentially deadly. Envenomation reported, but no deaths reported.
Hydrophis spiralis – deadly, larger than most sea snakes. Long fangs and large venom stores. Untreated envenomation likely to be fatal. Many human deaths reported as a result of bites from this snake. Aggressive, bites without provocation.
Lapemis curtus – deadly snake, causes renal failure with full envenomation. Deaths have resulted.
Lapemis hardwickii – venom not well studied, assume potentially fatal. Related to Lapemis curtis above.
Laticauda colubrina – few envenomations and no fatalities reported to this point.
Laticauda laticaudata – potentially deadly. No significant envenomations reported.
Thalassophina viperina – envenomation and death recorded after bites from this sea snake.



4 thoughts on “Venomous Snakes in Thailand (List by Species)

  • November 10, 2016 at 8:57 am

    if i sent you a photo of a snake in NE Thailand could you identify it for me and give info?

  • September 10, 2017 at 7:50 pm

    just a quick question , I seen a snake today in Soppong / Pang Mapha Mae Hong Son Thailand
    it would have been about 5 ,1/2 feet long black on top white underneath maybe about 2 inches thick/round very slight copper colour to the back of its head, from this do you know what sort of snake that was and if it’s poisonous, please ?
    September 10th 2017

    • September 11, 2017 at 6:54 am

      Could be a rat snake… impossible to say. (Ptyas korros, Ptyas carinatus, Ptyas mucosus)


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