Marsh Wren (IMAGE) University of Arizona Caption Birds, like this marsh wren, rely heavily on acoustic communication to stake out territories and attract mates. Credit Alex Badyaev/University of Arizona Usage Restrictions This visual may only be used in conjunction with reporting or posting this news release. Credit must be given 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.