Barb Tips of Male Blue-Winged Leafbirds (IMAGE) Yale-NUS College Caption Barb tips of male blue-winged leafbirds, showing the presence of colour-producing nanostructures. Credit Image provided by Dr. Vinod Kumar Saranathan. Usage Restrictions With appropriate credit to Dr Vinod Kumar Saranathan. 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.