Hawk
I looked out the window last Thursday and saw a small huddled creature on the garden path. When I got close enough, i realized it was a small raptor. In fact, it turned out to be a Coopers Hawk.
Best I can tell, it was chasing its lunch (they eat smaller birds) and didn't notice the window until too late.
It was pretty stunned but clearly recovering and somewhat pissed off...well, who wouldn't be...missed your lunch and bonked on the head!
By now it was moving around a bit...
That's not to say it wasn't still pretty pissed off...
A few minutes later, it flew off, presumably to restart the hunt for lunch.
Click on the image to enlarge.
I hope you enjoyed the interlude with a bird, Ding