Cassowary Feather (IMAGE) Field Museum Caption Microscopic detail of a cassowary feather, showing the exposed rachises that allow for iridescence. Credit Chad Eliason Usage Restrictions Please include credit to Chad Eliason 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.