Butcherbird and Male Fairy-Wren (AUDIO) University of Chicago Medical Center Your browser does not support the audio element. Caption A male fairy-wren sings in response to three butcherbird calls. Credit Emma Greig/University of Chicago 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.