I have never seen anything like this. I have a blue bird trying to come in window. The cat is going nuts. the blue bird keeps try to peck his way in and trying to fly in. I keep going out to scare it away from window it just keeps coming back. I am going to go put something on window, I am afraid it going to hurt it self. I just washed all my out side window and now my window is filthy. lol.