What’s the toughest frog in the land? My vote goes to the Wood Frog. It is the only frog found north of the Arctic Circle.
As the temperature drops below freezing each winter, the Wood Frog drifts into a deep hibernation; its breathing and heartbeat grind to a halt, and as much as 65% of the water in its body gradually crystallizes into ice. How’s that for tough?
Earlier this week we had a day with temperatures in the 50s and constant rain. During the night Wood Frogs migrated over to their breeding ponds. The male frogs call day and night in a duck-like, raucous quacking chorus.
The days following the migration have been cold, with temperatures in the 30s and 40s. The frogs have not been calling and stay hidden, awaiting higher temperatures.
I found this cold, dark example today under a log near the pond. It appeared to be in a trance and hardly moved, but it will be ready for action once it gets a bit warmer.
After laying eggs, Wood Frogs leave the pools of water to spend the rest of the year in wooded areas, often quite some distance from standing water. They blend in well with fallen forest leaves.
The Wood Frog grows to about three inches long. Its color ranges from pinkish-orange to tan to dark brown. It is easily recognized by its dark “robber’s mask.” It’s ability to withstand cold make for a pretty awesome amphibian.