A Birdsong Sung by a Zebra Finch (audio) Hokkaido University Share Print E-Mail Loading audio... Caption A birdsong sung by a zebra finch with disrupted projection neurons. Credit Hokkaido University Usage Restrictions This audio is copyrighted and can be used for reporting this research work without obtaining a permission if credited properly. Share Print E-Mail 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.