The Song of the Swamp Sparrow (AUDIO) University of Miami Your browser does not support the audio element. Caption The slow trills of the swamp sparrows can be heard during spring and summer across the Eastern and Central North American wetlands. Credit Adrienne DuBois and Bill Searcy 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.