FILE - 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. Federal scientists and land managers who've been crafting strategies to protect sage grouse habitat across the West for nearly two decades are going back to the drawing board under a new Trump administration edict to reassess existing plans condemned by ranchers, miners and energy developers. (AP Photo/David Zalubowski, File)