Those are probably crows, we have them in our village and there are alot of them here too, i know what you mean you wish you could shut them up right? They follow us in our cars, just joking, but do they know something we don't know? It is probably something natural to that type of bird. I see your posts and sometimes answer them do you see them sometimes. I am not always at my computer, but alot. I may have just skipped over a few posts if someone has already said what I would have said.