The most common of Thailand's venomous snakes including cobra, keelback, and Malayan pit viper.

Common Thailand Venomous Snakes – Photos, Videos, Links

Thailand’s 3 Very Common Venomous Snakes

 (Last Updated: 26 July 2016)

Thailand has approximately 60 snake species that are considered venomous and potentially dangerous to human beings. Below are photos, videos, and links to more information on some of the most common snakes that fit this description.

Calloselasma rhodostoma. Malayan Pit Viper. 

Very dangerous. Potentially deadly. This snake is active at night (nocturnal) and during dawn and dusk (crepuscular) and during rainy or very overcast weather. I have found them in the lowlands at sea level, and as high as 500 meters here in Thailand.

Info Sheet – Malayan Pit Viper (click)

Malayan pit viper with eggs
Calloselasma rhodostoma (Malayan Pit Viper) with eggs.
Small Malayan pit viper (Calloselasma rhodostoma) with a red tint in a plastic bottle for relocation.
Small Malayan Pit Viper in water bottle.

Adult fully grown Malayan pit viper from Southern Thailand. (Calloselasma rhodostoma)

The following is a video showing the color variations for the Malayan pit viper. These are all from Southern Thailand, so depending where you are in the country, yours may look similar or slightly different. The very triangle head shape and triangle pattern on the top back will not change.

1 Video – Malayan Pit Viper (Calloselasma rhodostoma) Color Variations:


Naja kaouthia. Monocled Cobra.

Very dangerous and potentially deadly. This snake is most active during the daytime, but is also sometimes found to be active at night. During some of the hottest days they can be seen regularly crossing the roads. Around 3 pm. seems to be a very active time for them.

Info Sheet – Monocled Cobras (click)

A small (juvenile) monocled cobra from Krabi province in Thailand's south. This is a potentially deadly snake that should be treated with great care and respect. Naja kaouthia.
Juvenile Monocled Cobra – quite deadly when small too.

Thailand monocled cobra baby on the road in Siam. Naja kaouthia.

3 Videos of the Monocled Cobra (Naja kaouthia):

1. Hatchling Monocled Cobras:

2. Jackie, a Burmese National, Catching a Monocled Cobra in a Local’s Yard:

3. Tom (Dtom, Dtammy) After Bitten in Thigh by Monocled Cobra:


Rhabdophis subminiatus. Red-necked Keelback.

This colorful snake was often kept as a pet and hand-held before it was realized they pack a deadly bite. Their venom is as strong as a banded krait on the LD scale. They are active during daylight hours and are commonly found across Thailand.

Keep in mind, the smaller the snake, generally the more quickly it can strike.

Info Sheet – Red-necked Keelback (click)

Red necked keelback (Rhabdophis subminiatus) is now classified as a deadly venomous snake.
Red Necked keelback – do not keep as a pet – can cause serious kidney damage.
Red Necked Keelback Snake, venomous, Thailand and southeast Asia.
A beautiful snake, usually under 1 meter, not very aggressive, but potentially capable of deadly bites.

1 Video – Red-necked Keelback (Rhabdophis subminiatus) Crossing the Road:

About Vern Lovic

Snake posts by Vern Lovic. Amateur herpetologist roaming about Thailand on field herping tours and events to find king cobras, kraits, vipers, corals, keelbacks, and other snakes native to Thailand. FYI - Thailand has over 200 snake species. Here's our latest book with detailed information on Thailand's 35 Deadly Snakes. "Is That Snake In Your House Dangerous? Identify Deadly Thailand Snakes In Under 5 Minutes!" INFO HERE.

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