Savannah Sparrow Song from 1980 (audio) University of Guelph Loading audio... Caption This is a Savannah sparrow song from 1980. The song would change from generation to generation, as a result of cultural evolution. Credit Bowdoin Scientific Station Usage Restrictions For use with stories relating to this release 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.