Resident killer whales (IMAGE) University of Exeter Caption Resident killer whales near the coast of Washington State, USA. Often the oldest female leads the group between hunting grounds. Credit Center for Whale Research Usage Restrictions This image may only be used with reports of this research 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.