Bird Help!

I was driving home from the grocery store, and about three blocks from my house, at this little park, I saw what looked like a cat at first.  But I stopped, went around, pulled to the side, and brought out my binoculars, and it was a bird!  Then I drove home, got my camera and zoom lens, and went back.  The bird was still there!  So I took some pictures.


I think this is an immature Ferruginous Hawk.  That would be a first for me, and a fairly rarish bird for this area, but it's migration time, and immature birds sometimes go a bit off the usual track.

Can anyone either help me make a better ID or have more confidence about the Ferruginous one, please?


UPDATE:  I got in touch with a local(sort of) raptor center, and they put me in touch with an expert, and he kindly explained that it's an immature (2012) Red-Tail Hawk.  I feel like such a noob.  Still, it was COOL to see!