Nightingale Nocturnal Song (AUDIO) BMC (BioMed Central) Your browser does not support the audio element. Caption This is a nightingale's nocturnal song. Credit Conny Bartsch 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.