Male Túngara Frog Calling (IMAGE) University of Chicago Press Journals Caption Male túngara frog calling, surrounded by blood-sucking flies attracted to its call. Credit (photgraph by X. Bernal) Usage Restrictions None 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.