For 2 days a sparrow has been pecking on my kitchen window in a desperate frenzy. The noise is driving me nuts. I can't figure out its strange behavior. No sparrow has ever done it in the past. First I thought it was thirstly since it is getting warm, so I put water out, but it didn't bother. Even if i shoo it away, it is back in a few minutes pecking with even more vengeance. The window has a mirror effect on the outside, so do you think he doesn't like his reflection and wants to fight with it. What should I do to make it stop pecking and disturbing us?