Sri Lankan Pit Viper

Trimeresurus trigonocephalus

Hiding in the Trees

Sri Lanka is primarily an agricultural country, resulting in a fair number of people being bitten by these green pit vipers while plucking tea leaves, clearing forests, and weeding.

About the Species

The Sri Lankan Pit viper is arboreal and nocturnal, occasionally descending to the ground in search of food.

The neck is distinct from the flattened, triangular head. The eyes are mid-size and the snout is short, rounded and broad. The Sri Lankan pit viper camouflages well with the forests it lives in. Typically, it is a green snake with a black pattern and a black line along side of its head is present. The males tend to have a blue coloration while the females are predominantly green.

Words From the Experts


The genus of snake this species belongs to, Trimeresurus, are commonly known as the green pit vipers. They are widespread throughout most of tropical Asia and account for many bites, especially amongst agricultural workers.


Did You Know?

These are bulky snakes with prehensile, short tails, suiting their arboreal lifestyle



Southern Asia


Grasslands and rainforest areas


Males: 60–75 cm | Females: 130 cm


Lizards, frogs, mammals, birds


Various raptors

Natural Defenses



Viviparous, produce 5–25 per birth


Not been assessed by IUCN

Life Expectancy

8–12 years

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