Wild and Bred Butterfly Wings (IMAGE) University of California - Berkeley Caption The wing of a typical Common Buckeye (right) and a butterfly bred to enhance the iridescent blue (left). The breeding thickened the chitin lamina of wing scales, changing the structural color of the scales from gold to blue. Credit Aaron Pomerantz 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.