I popped down to the hangar a couple of days ago and discovered that there is a birds nest in the trades dead center in the middle. Swept up the mess, and cleaned some droppings off the horizontal stab that was unfortunate enough to be sitting in the drop zone. Over the years, I've seen all sorts of things tried to keep birds out of hangars and barns. Rubber snakes, plastic owls, old CD's hung on strings, nothing seems to work for long. My dad swears by a trick he learned a few years ago when birds were taking over one of his pole barns; he claims that plastic shopping bags are the best solution due to the way that they crackle and move in the slightest breeze. I don't know if he's right, but he's 92 and I figure he's probably learned a few things during that many laps around the sun, so I brought my long step ladder from home and tied a few up in the rafters. time will tell I guess.