In the diagram at right, the successive stages of the anuran (toad and frog) life cycle are shown. The light blue region shows the purely aquatic, larval stages, popularly known as tadpoles or pollywogs. The beige region indicates the terrestrial stages capable of breathing air and existing on land. Adult frogs and toads return to water to lay and fertilize eggs, which develop into larva. The stages shown are:
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