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Keywords:Nebraska, Tympanuchus cupido, Valentine National Wildlife Refuge, air, air sacs, bird, birds, blind, boomer, booming, chicken, display, displays, gGreat Plains, grassland, grasslands, great, greater prairie chicken, ground, grounds, grouse, inflate, lek, male, mate, mating, pinnated grouse, plains, prairie chicken, prarie, ritual, sac, sacs, spring, wildlife
