Bruno D'Amicis / Sand viper (Cerastes vipera) sidewinding on sand dunes. Grand Erg Oriental, Kebili Governorate. Tunisia.

Chris Mattison / Sidewinder (Crotalus cerstastes) in sand dunes, Anza-Borrego Desert State Park, California, USA, May.

Daniel Heuclin / Sand Viper (Cerastes vipera) side winding across sand dunes, near Chingueti, Mauritania

Daniel Heuclin / Sand Viper (Cerastes vipera) in shade of grass, Erg Chigaga, Morocco

John Cancalosi / Sonoran Desert Sidewinder (Crotalus cerastes) with forked tongue extended, Arizona USA

Edwin Giesbers / Horned viper {Cerastes cerastes} buried in sand, captive, from North Africa

Michael D. Kern / Mojave Sidewinder rattlesnake with tongue flickering and rattle raised {Crotalus cerastes cerastes} captive from California, USA

Tony Phelps / Arabian Horned Viper (Cerastes gasperetti) in desert, Sharjah, UAE

David Shale / Horned viper moving across sand {Cerastes cerastes} United Arab Emirates

ZSSD / Colorado Desert Sidewinder (Crotalus cerastes laterorepens) on sand, venomous species native to deserts of California and Mexico

David Shale / Horned viper on sand {Cerastes cerastes gasperatii} United Arab Emirates

Neil Lucas / Horned viper {Cerastes cerastes} gliding sidewinding on sand dune, Morocco.