<i>Colias hecla</i> (IMAGE) Pensoft Publishers Caption This image shows Colias hecla, a cold-adapted species (species temperature index = -2.3°C) of arctic regions in Eurasia and North America. Credit Jostein Engdal Usage Restrictions CC-BY 4.0 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.