Green Hairstreak Butterfly (IMAGE) University of York Caption The researchers found that the Green Hairstreak butterfly (Callophrys rubi) was 25 percent less likely to go extinct in refugial areas. Credit Matt Cole 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.