Plumbeous Vireo Singing in a Quiet Area (AUDIO) National Evolutionary Synthesis Center (NESCent) Your browser does not support the audio element. Caption Listen to a plumbeous vireo singing in a quiet area. This was recorded by lead author Clinton Francis of the National Evolutionary Synthesis Center. Credit Recorded by lead author Clinton Francis of the National Evolutionary Synthesis Center. 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.