The venomous viper Daboia russelii.

horned viper (Vipera ammodytes) / Sahara sand viper (Cerastes vipera) / hognose snake (Heterodon spp.)

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.

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

A venomous viper, Vipera nikolskii, endemic to Ukraine, eastern Romania, and southwestern Russia.

A venomous viper, Macrovipera lebetinus, found in North Africa, much of the Middle East, and as far east as Kashmir.

Trimeresurus albolabris / Trimeresurus macrops / Trimeresurus trigonocephalus / Trimeresurus salazar

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

Any of the genus Echis of venomous vipers.

Russell's viper