Vipera
- adder
Small terrestrial viper common in northern Eurasia.
- asp
Of southern Europe; similar to but smaller than the adder.
Bitis
- puff adder
Large African viper that inflates its body when alarmed.
- gaboon viper
Large heavy-bodied brilliantly marked and extremely venomous west African viper.
Also contains
- pit viper
New World vipers with hollow fangs and a heat-sensitive pit on each side of the head.
- sand viper
Highly venomous viper of northern Africa and southwestern Asia having a horny spine above...