This evidence is supported by studies and quotes from experts. The Altamont Pass Wind Farm, known as the Altamont Wind Resource Area, has been equipped with newer, more efficient turbines, but these turbines pose a great risk to birds of prey (369). Biologists, soon after the first turbines were installed, “reported large numbers of golden eagles, hawks, and other birds of prey flying in the rotating blades” (Nijhuis 369). Steps have been taken to address this problem, but another study, this one by the California Energy Commission, estimates the number of birds killed at over a thousand (Nijhuis 370). Tim Cullinan talks about wind turbines in the Plains, noting that bird mortality in this region is significantly lower than in Altamont, he further comments that "we cannot lose sight of the greater benefits of wind", suggesting that despite concern for wildlife, wind power is vital and should continue (Nijhuis 371). Other environmentalists seem to agree, with groups suggesting guidelines and policies, particularly Audubon Washington is proposing multiple observation seasons for areas in which a wind farm could be built, studies of wildlife in that area and planning of wind installations both statewide and at multiple levels. -state level (Nijhuis 371). Generally speaking, environmentalists want to contribute to the growth of wind farms, believing that to help