Mallard ducks (IMAGE) Field Museum Caption Mallard ducks in the Field Museum's bird collections, used to study molting in modern birds. Credit Field Museum, Kate Golembiewski Usage Restrictions Please include credit License Original 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.