A Cane Toad (IMAGE) University of Arizona Caption The tiny, thumbnail-sized tadpoles of the cane toad grow into adults that are among the largest amphibians, requiring both hands to pick one up, according to John Wiens, who took this photo in Costa Rica. Credit John J. Wiens/University of Arizona Usage Restrictions This visual may only be used for the purpose of posting and/or reporting of this news release. Credit information must be provided as indicated. 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.