If your a hunter of canada geese or ducks, they don't fly near your decoys, in fact they don't come close to you. They have very good eye sight. What I don't understand is why the Geese hit the plane? Of course they must have seen the plane coming. when I heard of the crash and the plane hit birds, I knew right away it had to be Canada Geese, no other birds that size could take down a plane.