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. (AP Photo/David Zalubowski, File)
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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. (AP Photo/David Zalubowski, File)
