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Thailand’s Very Common Non-Venomous Snakes

[Last updated: 2 December 2019]

Thailand has around 185 snake species considered non-venomous, or mildly venomous and not a threat to human beings. Though these snakes are not known to be dangerous to humans, that doesn’t mean that they are not. The red-necked keelback, for instance, was a snake kept in aquariums across the world for years before the first deadly bites occurred. Turns out that they have a very strong venom that can be delivered with prolonged or multiple bites. Do be careful with all snakes.

Chrysopelea ornata. Golden Tree Snake

These snakes are very common and it is probably the most commonly seen snake among tourists and Thai locals. They are at home in the bushes and on the ground during the day. They are excellent climbers and prefer to eat the tokay geckos and other geckos. These snakes have a mild venom that can kill or disable birds and other small animals. It is not likely to affect your dog or cat, if bitten.

Info Sheet – Golden Tree Snake / Flying Snake (click)

Side view of Chrysopelea ornata, the flying snake, or the golden tree snake. — Golden Tree Snake

Golden tree snake (Chrysopelea ornata) close-up. — Golden Tree Snake – aka Flying Snake. Not dangerous. Quite fast in trees.

Chrysopelea paradisi, the paradise tree snake, or paradise flying tree snake from Southern Thailand. — A close relative of the golden tree snake, this is the ‘paradise tree snake’ – Chrysopelea paradisi. Very similar in appearance with the addition of some orange or red color to some of the scales on the top of the body and head.

Golden Tree Snake Video

Juvenile Chrysopelea ornata with Bright Colors:

Paradise Tree Snake Video – Catching Chrysopelea paradisi from a Tree in Southern Thailand:

Ahaetulla prasina. Oriental Whip Snake

Oriental Whip Snake, Ahaetulla prasina, from Thailand — Oriental Whip Snake – Venomous – Not Dangerous

The oriental whip snake is a really gorgeous snake with a very thin body – up to two meters in length. The color is usually bright green, but there are some which are grey, brown, or even yellow. This snake is harmless for people, but has a mild venom which affects lizards and birds they prey on. Easily recognized by it’s very long head in the shape of an arrow, and another feature, harder to see – the tongue stays out when annoyed.

Ptyas korros. Indo-Chinese Rat Snake

This rat snake is also very common no matter what type of weather or season. These are terrestrial (land-based) snakes with excellent climbing skills. They hunt lizards and other small animals on the ground during daylight hours. Rat snakes have no fangs, but their saliva is known to contain venom proteins. Nobody has been recorded in the literature as having been envenomated significantly by these snakes. Color varies from brown to grey or black.

Info Sheet – Indo-Chinese Rat Snake (click)

Grey Indochinese rat snake in Thailand — Indochinese rat snakes eat predominantly rats and other rodents.

Indo-Chinese Rat Snake Video

A Juvenile Rat Snake – Brown with Light Banding Typical of Young Ptyas korros in Southern Thailand:

Coelognathus radiata. Copper-headed Racer / Radiated Rat Snake.

These rat snakes are common around trash bins, and anywhere rats and other rodents can be found. Though they are primarily terrestrial, I have seen one 3-4 meters up a palm tree raiding a bird nest of its young or eggs. These are strong, very fast striking snakes with a lot of nervous energy. Like the other rat snakes, it has no fangs with which to deliver venom.

Info Sheet – Copper-headed Racer (click)

These radiated rat snakes can be more yellow and brown. This one is quite orange colored. Coelognathus radiata. — While usually the radiated rat snake has more of a yellow tone to it, this one was quite orange / brown. They have an amazing pattern when defensive and flared up.

Copper-headed Racer Video

Juvenile Copper-headed Rat Snake (Radiated rat snake) Caught on the Road:

Adult Copper-headed Racer (Radiated rat snake) – Letting Go in Wild:

Kukri Snakes

Purple Kukri Snake - Harmless and common in Thailand. — Oligodon purpurascens, a very common kukri snake in our area. These have a fairly wide range in the south of Thailand.

Kukri snakes are found Thailand wide – and nearly all of them have the distinctive pattern on the top of the head as shown in the image above. Kukris are ground snakes which like cruising through and around the leaf litter. They eat eggs of all kinds, and small animals. While they are not venomous, they do have enlarged rear teeth which are shaped like kukri knives. They use these specialized teeth for cracking eggs so they can drink the inside yolk.