We know we've been discovered

This morning I walked by the kitchen window and noticed chickens flapping around out of the corner of my eye. I looked over to see a hawk sitting on top of one of the chicken tractors. I was on the phone with David at the time. I wish I had taken a picture before opening the door and hollering at it. It had a narrower body than most of the hawks around here and was gray with white strips. Very distinct stripes on the tail from what I recall. I am not having much luck figuring out what kind it was. I only saw it from behind so I have no idea of the belly color. But I have no recollection of seeing any brown on it at all.