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Frost Free Frogs?

Posted on Feb 24, 2017

“The animal kingdom relies on staggering evolutionary innovations to survive winter.” Bernd Heinrich renowned biologist and author – made this statement in his bestselling book entitled “Winter World”.

The Wood Frog (Rana sylvatica) is a true embodiment of this statement; these tiny amphibians can survive for weeks with an incredible two-thirds of their body water completely frozen—to the point where they are essentially solid frogsicles! The adaptation that enables this remarkable feat is known as a cryoprotectant – a substance that prevents damage to cells and tissues during freezing. Given the unseasonably warm temperatures as of late, our local Wood Frogs have likely thawed and are eagerly anticipating the arrival of spring.

Wood Frogs (Rana Sylvatica) – photo by Twan Leenders