Attacked caterpillar (IMAGE) Swedish Research Council Caption The authors used bite marks on the caterpillars to identify the predator. In this case, the plasticine caterpillar has been repeatedly pinched by the wedge-shaped beak of a bird. Credit Tapani Hopkins 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.