Mojave desert sidewinder (Crotalus cerastes cerastes)
at the Woodland Park Zoo.
Emerald horned pit viper (Ophryacus smaragdinus) at Faunia in Madrid, Spain.
Saharan sand viper (Cerastes vipera) at the Phoenix Zoo.
Saw-scaled viper (Echis coloratus) at the Phoenix Zoo.
Karaganda pit viper (Gloydius halys caraganus) at the San Antonio Zoo.
Hungarian meadow viper (Vipera ursinii rakosiensis) at the Budapest Zoo.
Terciopelo (fer-de-lance) (Bothrops asper) at the Naples Zoo. This juvenile was born via parthenogenesis, an asexual form of reproduction.
White-lipped tree viper (Trimeresurus albolabris) at the Houston Zoo.
Wagler’s temple viper (Trimeresurus wagleri) at the Fort Worth Zoo.
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