STT-Presse (IMAGE) University of Vienna Caption This figure shows various techniques the birds used to achieve the nut. Credit Copyright: Alice Auersperg Usage Restrictions The image may only be used with appropriate caption or credit. 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.