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


Native habitat is in wet zone grasslands and rainforest areas.


Males are smaller than females. Males are approximately 60-75 cm, while females can grow up to 130 cm in length.


Diet consists of lizards, frogs, mammals and birds


Various raptors

Natural Defenses

It will vibrate its tail tip, form a loop with the fore body and lash and attempt to bite and inject venom


These are viviparous snakes and produce 5-25 young at once.


Not been assessed by IUCN

Life Expectancy

8-12 years

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