Wood frogs -- 001

Wood frogs -- 001

wood frog moving toward pond

Wood frogs are an ideal species to study to develop predictions about how animals will respond to warming conditions, researchers believe. They are cold-weather frogs with a range that extends further north than other amphibians. As such, the have evolved with some amazing adaptations, not the least of which is the ability to survive freezing solid in winters.

Image: Staci Amburgey / Penn State