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Wood Frog

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description Wood Frog Overview

The wood frog (Lithobates sylvaticus) is a widely distributed amphibian native to North America, ranging from the southern Appalachian Mountains all the way to the Arctic. It is uniquely adapted to survive freezing temperatures during the winter months by producing glucose, which acts as a cryoprotectant to prevent its cells from freezing solid. This physiological trait allows the frog to endure ice crystals forming inside its body cavity and organs. It is commonly found in moist woodlands and serves as a key species for scientists studying freeze tolerance in vertebrates.

help Wood Frog FAQ

How does the wood frog survive freezing in winter?

The wood frog survives by producing high amounts of glucose, which acts as a cryoprotectant antifreeze in its organs. Up to 65% of the frog's total body water can freeze solid during winter without killing it. Once temperatures rise, its heart resumes beating and it thaws out.

Where is the natural habitat of the wood frog?

The wood frog has a massive range across North America, extending from the southern Appalachian Mountains all the way up to the Arctic Circle. It is notably the only frog species found north of the Arctic Circle, thriving in cold boreal forests.

What do wood frogs eat?

Wood frogs primarily feed on insects, worms, and other small invertebrates found on the forest floor. Tadpoles are omnivorous and will eat algae, detritus, and sometimes even smaller tadpoles. Their diet helps control pest populations in woodland ecosystems.

How can you identify a wood frog?

The easiest way to identify a wood frog is by the dark "robber mask" marking across its eyes. They also typically have a brown or rust-colored body with a light stripe down their back. Their coloration helps them blend into the dead leaves of the forest floor.

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