Bird Identification: Rough-legged Hawk?, 1 by Elphaba

Elphaba wrote:
A friend and I went looking for a Rough-legged hawk that had been reported a few hours drive south of here. This is one of the hawks that we saw in the area where the Rough-legged Hawk had been seen. It was kiting over the prairie. Could this be the dark morph? Is it an immature White-tailed Hawk? I have four pics but I'll start with this one b/c I think it is the most telling. All of the photos have been lightened up a ton -- the lighting was bad but the bird also seems really dark.