Although they are air breathers, frogs can stay underwater for long periods, and they can breathe through the skin. Tree frogs are adapted for tree living; other frogs are permanently aquatic; still others spend most of their lives in underground burrows, coming up only to feed or breed. Like all amphibians, a frog's body temperature depends on its surroundings, and in colder regions frogs burrow in mud to hibernate...
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Like all amphibians, a frog's body temperature depends on its surroundings, and in colder regions frogs burrow in mud to hibernate. Some kinds, such as certain Australian frogs, estivate-that is, lie in a state of torpor during intense heat-after burying themselves in sand and clay. Frogs subsist principally on insects, worms, spiders, and centipedes...
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