Andrew DeWoody, Purdue University (IMAGE) Purdue University Caption Andrew DeWoody, at left, used DNA from eagle feathers to get more accurate counts of eagle populations that may be used for better conservation of the birds. Credit Purdue University file photo 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.