If you have never seen a prairie chicken stomp their feet, it's very hilarious. After the females leave the booming grounds, the males walk around and use confrontive crouching to maintain their territories. This means they squat and stare at each other. Also, three different notes are used to make the booming sound. It can be heard a couple of miles away on a clear day.
Males defend their territories from other male prairie chickens.
Most territories are often 100 square feet each. I didn't even know that they had eyebrows.