Meet the only North American amphibian who lives north of the Arctic Circle.
Not this little guy — he lives in my garden — but his cousins in Alaska and northern Canada. Each winter the wood frog does something seemingly impossible: It freezes and thaws several times.
Incredible? Yup. Wood frogs hibernate near the ground surface, often under leaf litter. As the air temperature drops, so does their body temperature.
If you find one of these frogs during a cold spell you might think it was dead. No heart beat. No blood flow. No brain activity. Drop him on something hard and he’ll go clunk.
Yet as the air warms up, so does he. This can happen repeatedly during the winter and no harm done.
Pretty impressive for a guy that eats snails, worms and insects. Clever little bandit.
Wood frog Rana sylvatica