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Frozen Frogs
One type of frog hibernates in an unusual way. It has the ability to freeze solid in extremely cold temperatures and then thaw when it warms. It does this without causing any harm to itself. Something special found in its blood acts in the same way as liquid antifreeze, which keeps the water in a car's radiator and engine from freezing in cold temperatures. The frog produces its own form of antifreeze.
Click on the left to watch a video about this different form of hibernation.
Then write down one advantage and one disadvantage for animals that use hibernation as a survival strategy.