A success story. The greater Prairie Chicken resides only in one county here in Colorado and in 1973 was placed on the endangered spices list. But in 1998 they were delisted to a special concern/non-game status.
The male chickens dance and make a ‘booming’ sound while puffing out their air sacs to court the fairer sex. This ritual lasts from about 5:30 am to around 9am every day, no holidays or weekends off. Talk about dedication, ladies 
The Colorado Department of Wildlife has a great video on the mating dance, very informative.
