Wood Frog (IMAGE) Penn State Caption 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. Credit Staci Amburgey, Penn State Usage Restrictions non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.