Wood Frog Animal Pictures
Lithobates sylvaticus
© Marek Mierzejewski/Shutterstock.com
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Craziest Animal Adaptations: Wood Frog
The wood frog lives farther north than any other North American amphibian. Glucose in the frog's cells protects its body from damage caused by freezing, although nearly a third of the body fluids can be frozen without killing it.