Animal

Cerastes

A genus of Viperinae found mostly in Africa, Arabia and India with characteristic horny scale over each eye. Cerastes genus includes Saharan sand viper (Cerastes vipera) and horned desert viper (Cerastes cerastes). A desert sidewinder Crotalus cerastes also has horny scale over its eyes but is a species in sister subfamily Crotalinae and found in Southwest American desert.