Mexican Tree Frog (image) University of Arizona Caption This Mexican tree frog from the Yucatan Peninsula, on the other hand, represents one of many species whose existence is threatened by a warming climate. Credit John J. Wiens Usage Restrictions This visual may only be used in conjunction with reporting/posting of this news release. Image/video credit must be included exactly as indicated. 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.