Audio Duet Code 2 (AUDIO) University of Miami Your browser does not support the audio element. Caption This is a complex and seamless duet code sung by mated wrens in the wild. Credit Karla Rivera-Cáceres Usage Restrictions editorial only 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.