Snakes are a group of reptiles with the main characteristics of legless and long bodies. Snakes have no hearing at all and have no eyelids to open and close, but feel vibrations through their lower jaws when they hit the ground. For the most part, snakes live on the ground, and some live in trees. The type of carnivorous animal, preying on animals smaller than its body, some snakes are venomous and some are non-venomous.