The Greater Prairie Chicken or Pinnated Grouse, Tympanuchus cupido, is a large bird in the grouse family. This North American species was once abundant, but has become extremely rare or extinct over much of its range due to habitat loss. There are current efforts to help this species gain the numbers that it once had. One of the most famous aspects of these creatures is the mating ritual called booming. Adult males have a yellow-orange comb over their eyes. Males also have dark, elongated head feathers that can be raised or lain along neck. A circular, orange unfeathered neck patch can be inflated while displaying. Adult females have shorter head feathers and lack the male's yellow comb and orange neck patch.