In this April 20, 2013, file photo, male greater sage grouse perform mating rituals for a female grouse, not pictured, on a lake outside Walden, Colo. A federal court has killed a large wind energy project in southeast Oregon over concerns about a declining sage grouse population that needs the area to breed. The U.S. District Court in Portland vacated plans for the project Tuesday, April 18, 2017, bringing an end to lengthy litigation over the proposal by Columbia Energy Partners. (AP Photo/David Zalubowski, File)
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