RUIJIA HU (IMAGE) University of Cincinnati Caption University of Cincinnati doctoral student Ruijia Hu examines telltale signs of woodpecker activity in the trunk of a tree in Cincinnati, Ohio. Credit Andrew Higley/UC Usage Restrictions None License Original 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.