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