That was interesting. This kind of reinforces some of my observations. (Take that for what it is worth) I spent a few days with my elbows on the ledge of the blind watching hundreds blue bills flying in and out about 80 yards out in the bay. The blinds are in a State park. The ducks avoided the blinds. But if you would go to a parking lot not but a few hundred yards away, They are there floating around not anymore than 15-20 yards out. They couldn't care less about you standing there watching them.