(we really don't want to know about your
weird one

)
Same thing happened to me at the Watersound house about a month ago. I was the only one at the house, had driven in late on Friday night and was going to sleep in...yaaaaahoo! NOT!!! I was rudely awakened around 7:00 to a tap, tap, tap. Huh? What? Rolled back over. TAP, TAP, TAP!! I get up thinking OMG! Who is knocking on my door this early?! Look out the door....nothing. Back to bed. TAP! TAP! TAP! WTF?!!! I sit up.....wait.....wait....there it goes again! It's at the bedroom window on the north side of the house....yank back the blind.....nothing there. Then I see on the little fence around the heat/air systems bird poopie. I close the shade...tap, tap, tap. Peek out and there is this huge cardinal....he means serious business.....he sees his reflection in the window....and is trying to run that other bird off!
Thanks Kurt I will try the paper on the outside of the window this weekend.