This is a light-morph, male Rough-legged Hawk (my call, though I don't claim to be an expert with hawks) that I just happened to notice as it was hovering low, 30 yds from the highway. I turned around near the I-80 overpass and pulled off the road across from the hawk. (Nikon D200 with Nikon AF-D 300mm f4 ED lens), I captured a few images as the hawk hunted in the harsh mid-afternoon sunlight! These are not the best images to show, but they illustrate some of the field marks for this bird.
Rough-legged Hawk, light-morph, male. This large buteo, hovers while seeking small mammals as prey.
Field marks: a) dark wide tail band; b) dark, barred belly band; c) dark carpal patches on underside of wings.
Rough-legged Hawks have small beaks, and long, narrow wings.
The forehead is white and the legs are feathered to the toes.
Rough-legged Hawk perched: note feathered legs, down to toes.