On our snake classification page we see that lizards and snakes belong to the same taxonomic order. The main feature separating lizards and snakes is not that lizards have legs and snakes don't. After all, some lizards, such as the California Legless Lizard, Anniella pulchra, have no legs, while among snakes members of the Boa and Python family bear vestigial hind legs in the form of "spurs" on their rear ends. The main thing separating lizards from snakes is also one of the snakes' most important adaptations. That is, snakes have an unusually flexible jaw mechanism enabling them to swallow objects several times the snake's own diameter.