Banded demoiselle (Calopteryx splendens) (IMAGE) Lund University Caption Banded demoiselle (Calopteryx splendens), one of the two species in the study Credit Erik Svensson 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.