Cerastes cerastes (Horned Viper) is a species of snakes in the family vipers. They are found in Afrotropics and the palearctic. Individuals are known to live for 18 years.
Definition: The largest scale biogeographic division of the earth's surface based on the historic and evolutionary distribution patterns of plants and animals.
Definition: A desert biome is a terrestrial biome which loses more liquid water by evapotranspiration than is supplied by precipitation and includes communities adapted to these conditions.