<i>Heliconius</i> Butterflies (IMAGE) University of Cambridge Caption Butterfly co-mimic pairs from the species Heliconius erato (odd columns) and Heliconius melpomene (even columns). Illustrated butterflies are sorted by greatest similarity (along rows, top left to bottom right) using machine learning methods which enable new tests and discoveries in evolutionary theory. I Credit J Hoyal Cuthill Usage Restrictions Credit J Hoyal Cuthill 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.