3:45 p.m.: He's still at it. 6 hours, 45 minutes and counting. But now, he's in full attack mode, fluttering up to hit the window once every 15 or 20 seconds. This is one really pissed off rufus-sided towhee. I've gone out and tried to shoo him away -- poor little guy must be exhausted! -- but he just comes back after a few minutes. The saga continues.