What capability related to winter survival underscores the Wood Frog's hardiness?

Answer

They possess the ability to survive being frozen solid during winter dormancy.

A notable aspect of the Wood Frog's physiology, which contributes to its ability to hold the northernmost breeding range, is its remarkable tolerance to extreme cold during its winter dormancy period. This amphibian is physiologically equipped to survive the state of being completely frozen solid. While this hardiness protects them through the winter, their vulnerability remains centered around the narrow reproductive window and the fragile nature of their ephemeral aquatic nurseries.

What capability related to winter survival underscores the Wood Frog's hardiness?
locationamphibiandistributionfrog