Pygargue à tête blanche
The Institute for Wildlife Studies, a separate conservation organization, has worked to restore bald eagles to the island on Conservancy land since the late 1970s. Bald eagles had been common on the island until the 1960s, when it is believed that the effects of dumping the pesticide DDT off the coast of Southern California made it impossible for eagles to successfully hatch their young. The reintroduction of the bald eagle to the island may also edge out an invasive golden eagle population that threatens the native island fox.