A Male White Bellbird (IMAGE) University of Massachusetts Amherst Caption Now recognized as the loudest in the world, Amazon white bellbird calls have a sound pressure about three times that of screaming pihas, another Amazon species now demoted to the second loudest bird singer documented, say Jeff Podos of UMass Amherst and Mario Cohn-Haft at the Instituto Nacional de Pesquisas da Amazôni, Brazil. Credit Anselmo d'Affonseca, Instituto Nacional de Pesquisas da Amazonia 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.