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Frogs and toads are tailless, aquatic, semiaquatic, or terrestrial amphibians characteristically having a smooth moist skin, webbed feet, and long hind legs adapted for leaping.  Adults lack tails and most have a well-developed ear and a voice used to attract mates, drive off intruders and to signal distress and presence.  All are carnivorous as adults.  With their moist skin, most frogs and toads are prone to dessication (drying out), and therefore are confined to wet or moist habitats.  However, some species have adapted to more arid habitats by burrowing into the soil or hiding beneath rocks or logs to avoid the heat of the day.  Most species return to water to breed.