The Extinct Terror Bird (IMAGE) U.S. National Science Foundation Caption The terror bird Andalgalornis, an extinct flightless predatory bird found as a fossil in Argentina. Credit Witmer Lab 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.