White-lipped Viper Trimeresurus (Cryptelytrops) albolabris

The White-lipped Tree Viper, also called just White-lipped Viper, is a pit viper native to tropical forest of South and Southeast Asia. Its green colour provides good camouflage in the trees.

Its fangs inject venom which stops blood from clotting after being bitten by the snake. Prey is small birds and mammals. Males grow to some 23 inches (60cm) long and females some 32 (80cm).