I'm new to the Reston area. When I took these photos, I thought it was a Cooper's hawk, but after reviewing them at home, I'm doubtful. The first three photos are of the same bird. The last two were taken about 90 minutes later at a spot about a mile away from the first three, so it's probably a different bird. I've heard that red-shouldered hawks are pretty common around here. Could either/both of these birds be red-shouldered hawks?