plural of pit viper

Any of various venomous snakes, of the subfamily Crotalinae, found in Asia and the Americas, with a deep pit or fossa on either side of the head that enables them to detect prey by infrared.

plural of shore pit viper

A pit viper of the venomous species, Trimeresurus purpureomaculatus, found in India and Southeast Asia.

Trimeresurus albolabris / Trimeresurus macrops / Trimeresurus trigonocephalus / Trimeresurus salazar

Hypnale zara, a species of pit viper endemic to Sri Lanka.