Snakes do not have legs, eyelids or ears. Some snakes kill their prey by constricting, others with venom. But the majority will bite and hold on to their victim. All snakes swallow their prey whole. The largest sub-group of reptiles are the lizards, with over 3,000 species.
All lizards have external ear openings and movable eyelids.
Some lizards are legless. Other notable lizards include Komodo dragons, iguanas, chameleons, geckos, and skinks. Amphisbaenids, or worm lizards, are burrowing reptiles. Only three out of a hundred or so species have any legs at all. Their worm-like bodies are ringed with small scales, they have tiny eyes covered with scales, and no ears.