Lizards :: essays research papers

LizardsLizards belong to the class Reptilian, Scientists have said that Reptiles have been on earth for about 200 million years. Lizards make up the largest group of reptiles with more than 4,300 species around the world varying in different shapes and sizes. Lizards look very similar to salamanders but they differ from each other in many ways such as their dry scaly skin and have clawed feet and external ear opening. The majority of lizard are quite small have 4 legs and have a fragile tail that can regenerate when part of it is taken off. Lizards are cold-blooded or ectoderms, which means that they depend on sources outside their bodies like the sun, to raise and maintain there body temperatures. Eating habits vary for lizards and depend upon the species. Some lizards feed only on insects such as the Iguana. On the other hand some eat rodents that roam deserts and eat eggs and small rodents and some feed on both rodents and insects. For protection many lizards use their teeth to scare predators off. Lizards are found in tropical and subtropical regions within the world.