Spectra of Birdsongs (IMAGE) World Scientific Caption These charts show the spectra of birdsongs. Credit Jiawei Zhang, George Kossan, Richard W. Hedley, Ralph E. Hudson, Charles E. Taylor, Kung Yao, Ming Bao, 2014 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.