Lizards are the largest groups of reptiles, with over 6,000 members. They include all reptiles, except for snakes, crocodilians, and turtles. Did you know that some lizards can go their entire lives without drinking water? Some can detach their tails if caught by surprise. Others - like chameleons and anoles - can change their skin color at will. Most lizards lay eggs, but about 20% give live birth to their young. And some - like the Marine Galapagos Lizard - can swim!