There is a direct competition between males to win the attention of the females in salamanders and newts, with elaborate courtship displays to keep the female's attention long enough to get her interested in choosing him to mate with. The kidneys are bean-shaped organs which are present on each side of the vertebral column in the abdominal cavity. Locomotion on land is by walking and the tail often swings from side to side or is used as a prop, particularly when climbing. The skin contains many mucous glands and in some species, poison glands a type of granular gland. However, as excretion involves several functions that are only superficially related, it is not usually used in more formal classifications of anatomy or function. Reptiles as Pets Many Reptile species, including various lizards and turtles, are very popular all over the world as exotic pets. University of California Museum of Paleontology.
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