examples of reptiles 
Reptiles: cold-blooded vertebrates covered in scales (about 6,000 species) having limbs that are sometimes atrophied or absent.
Venomous snake found in hot arid regions of Eurasia and Africa with a flat triangular head and short tail; its bite can be fatal.
Slender venomous snake of the Americas living under rocks or hidden in the ground; its bite can be fatal.
Large nocturnal nonvenomous snake found in hot regions of Asia, Africa and Australia; it lives mainly in trees and kills its prey by strangulation.
Venomous snake found in tropical regions of Asia and Africa; it inflates its neck when threatened.
Venomous land snake of the Americas; it rattles its scaly tail to warn off enemies.