African Starling (image) University of California - San Diego Share Print E-Mail Caption Minuscule packets of melanin sandwiched between keratin in the feathers of this African starling interact with light to produce the iridescent colors on its back. Credit Liliana D'Alba Usage Restrictions For use only in reports about this research. For other uses please contact email@example.com. Share Print E-Mail 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.