Blue oaks (IMAGE) University of California - Santa Cruz Caption A die-off of California blue oaks (Quercus douglasii) occurred after the extreme drought of 2014, including many of the trees on this hillside in Griswold Hills, southern San Benito County. Credit (Photo by Ryan O'Dell, BLM Central Coast Field Office) Usage Restrictions For use only with news coverage of this research 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.