Zebrafinches (IMAGE) Max-Planck-Gesellschaft Caption Singing siblings: zebra finches that grew up without their dads and therefore without a "song model", don't have to worry about a lack of singing repertoire. As researchers discovered, the birds can also learn their song through their brothers. Credit Huet des Aunay 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.