Mock Viper – Venomous – Not Dangerous

Mock Viper – Venomous – Not Dangerous

Mock Viper - Non Venomous - Not Dangerous, native to Thailand
Mock Viper - Non Venomous - Not Dangerous

Psammodynastes pulverulentus (Mock Viper, Dusky Mock Viper, Common Mock Viper)

Thais say: (ngoo mok)

Length: average about 75 cm (28 inches)

Range: All over Thailand and southeast Asia including Indonesia, Philippines, Vietnam – even getting over to Nepal and the other way, Taiwan.

Habitat: Typically the mock vipers enjoy hilly regions. I found one at a local Buddhist temple (the mock viper you see in the images on this page) at the bottom of a limestone mountain, with a skink it had just killed in southern Thailand. Mock vipers can also be found under leaves and brush. Apparently they like a variety of habitat.

Active Time? Nocturnal primarily, but as I mentioned I found mine during the morning about 10:30am. These Thailand snakes are terrestrial – preferring the ground to trees.

Food: Skinks and other lizards, and of course, frogs – like nearly every other snake in Thailand! This mock viper also, occasionally eats other small snakes.

Defensive Behavior: Slow to bite, they coil up as most snakes and strike. I handled mine repeatedly and didn’t get struck at but a couple of times.

Venom Toxicity: Not strong enough to hurt humans. Don’t let it bite down on you for more than a couple of seconds though.

Offspring: This species is ovoviparous, embryos develop inside eggs which remain inside the mother where they hatch. Mating has been observed occurring for over one hour in a tank for m/f mocks in captivity.

Notes: These are really beautiful snakes. Mock vipers have a thick, strong body. They are not really vipers, but they do possess a weak venom that doesn’t affect humans much. They are rear fanged. Female mock vipers are larger than the males on average at adulthood.

READ THIS: There is a chance you will confuse it with the highly toxic venomous snake, the Malayan Pit Viper. I did. It has markings that are very similar, though it doesn’t have the giant triangular head of the Malayan pit viper – it is pretty close. I thought I had a mutant mock!

Mock Viper top and head, Thailand venomous snake
Very distinct markings, not similar to a Malayan Pit Viper when looked at closely
Mock Viper with Dead Skink Meal
He regurgitated that skink as some tourists poked him with a stick before I arrived.

Mock Viper Video – One I caught in southern Thailand:

Common Mock Viper Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Genus: Psammodynastes
Species: P. pulverulentus
Binomial name: Psammodynastes pulverulentus
(classified by H. Boie, in year 1827)

About Vern Lovic

All posts by Vern Lovic. Amateur herpetologist roaming about Thailand on field herping trips to find cobras, kraits, coral snakes, and other snakes native to Thailand. Thailand has over 200 snake species with many of them venomous.

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