Mimetic Forms (IMAGE) University of Exeter Caption This image shows Melinaea (left) and Heliconius numata mimetic forms. Credit Mathieu Joron Usage Restrictions One use only - to accompany this story. Please credit Mathieu Joron. 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.