Johnson, Jeff A., Michael A. Schroeder, and Leslie A. Robb. 2011. “Greater Prairie-Chicken (Tympanuchus cupido).” The Birds of North America, edited by Paul G. Rodewald. Ithaca: Cornell Lab of Ornithology. Retrieved from the Birds of North America: https://birdsna.org/Species-Account/bna/species/grpchi doi: 10.2173/bna.36