I just had the most extraordinary thing happen! Mike happened to look out the window and he noticed two hawks on the ground next to one of our bird feeders about 20 yards from the house (it happens--buffet). One hawk startled off before I could catch a glimpse, carrying what we assume was a small bird, but the other stayed. I watched it for a minute or so walking around in the snow before I noticed a sparrow trapped inside the bird feeder. The hawk jumped up on the split rail fence next to the feeder and tried to attack the sparrow inside. We watched the hawk, a female Cooper's, beat herself against that feeder trying to get at the sparrow for about 5 minutes? She'd try, and then take a rest, assess the situation, and try again. I watched as long as I could stand to see the sparrow tortured and then I went out to set it free. The hawk flew up into a tree about 20 yards from the feeder and sat there while I set the sparrow free. Sure enough, as soon as the sparrow was loose, she took off after it! She wasn't phased by my presence in the least! Amazing! And where was my camera during this saga? In the office.