Ben Winger, University of Michigan (IMAGE) University of Michigan Caption University of Michigan evolutionary biologist Benjamin Winger with some of the migratory songbirds used in a large study of avian responses to climate warming. Credit Roger Hart/University of Michigan Photography. 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.