Lizards are reptiles of the order Squamata, which they
share with the snakes. They are usually four-legged, with
external ear openings and movable eyelids. Species range
in adult length from a few centimeters (some Caribbean
geckos) to nearly three meters (Komodo dragons). Some
lizard species called "glass snakes" or "glass
lizards" have no functional legs, though there are
some vestigial skeletal leg structures. They are distinguished
from true snakes by the presence of eyelids and ears.
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