|Greater Prairie Chicken|
Displaying Greater Prairie Chickens inflate their throat sacks and raise their specialized neck feathers (called pinnae) to a vertical position. They also engage in a dancing behaviour which is not quite as energetic as Sharp-tailed Grouse, but is more so than the two Sage-Grouse taxa.
|Greater Prairie Chickens Face Off|
Interestingly, all five prairie grouse taxa share a very close genetic affinity, despite the morphological differences which are apparent between displaying males of each species. The rate of morphological modification in a population is known to outpace genetic change in species, like these grouse, which exhibit a strong pattern of sexual selection.