On April 3, the Migratory Bird Division of the Region 8 U.S. Fish and Wildlife Service (FWS) sent a letter to the California Energy Commission (CEC) expressing concern about the threat to wildlife by BrightSource Energy’s proposed Hidden Hills Solar Electric Generating System in Inyo County, California near the Nevada border. The letter raises concerns about the effects of exposure to elevated levels of solar flux on birds, and says that the data provided regarding the use of the project site by Golden Eagles and other raptors is insufficient. Further, FWS says that it is pleased that CEC and BrightSource are considering the implementation of measures to offset the adverse effects of the proposed project to migratory birds and their habitat, but cautions that the proposed mitigation does not alleviate responsibility for minimizing the impact on migratory birds under the Migratory Bird Treaty Act. Finally, FWS says that it supports the development of a Bird and Bat Conservation Strategy (BBCS) for the project.