My land joins my fathers and he has about 50 acres and a real long driveway, He has been telling me about this grouse that won't leave him alone, it follows him everywhere as long as he is at home or up and down the driveway. It will chase you when your in the truck and fly into the windows! I was down there today and sure enough so was the crazy grouse, he chased me up the driveway then followed me to the front door and almost came in the house. My father talked to someone at the grouse society and they came out and took a bunch of pictures of it and wrote an article, they say that some young males claim an area and try to drive anyone out anyone in that area (usually 10 acres or so). They told my dad his only option was to move I took a pic with my camera phone out my truck window