I ruled out Sharp Shinned hawks by size. Females don't get over 13". This bird is around 18" long. I used the 1.5" board the bird is standing on as a scale reference. Coopers females can get that big, but would be a big one. Both Coopers and Sharp Shinned Hawks have narrower tails than what I think this one has. They also tend to have tails marked with more distinct bands. This bird is marked with a more barred type pattern on the tail. I am not able to see all of the tail however. Cooper's and Sharp Shinned Hawks do not tend to have darkened patagial markings that many red tails do have. Red Tails vary widely in appearance especially where their sub species ranges overlap. There is also dark morphs, light morphs etc. Again I am no expert, these were just my thoughts. Regardless you took good pictures, and it is a beautiful birds.