Song Sparrow and Antenna (IMAGE) University of Washington Caption A juvenile song sparrow shows off a radio antenna that enables researchers to track it as they study how the birds learn to sing. Credit University of Washington Usage Restrictions News media 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.