saharan horned desert viper, cerastes cerastes, sand, northern africa. supraorbital

africa aggressive alegeria animal brown camouflage cerastes close crawling creature danger dangerous deadly desert egypt eye fauna head herpetology horned horns israel lethal libya macro marocco natural nature northern pattern poison poisonous portrait predator reptile saharan sand serpent sidewinder snake supraorbital texture venom venomous vertebrate viper white wild wildlife yellow zoology