Hawk Sighting

Keith and I were so lucky yesterday to spot this raptor in our neighbor's tree. It moved from the tree to the clippings pile below... We think it's a Sharp-shinned Hawk, except that they don't typically like to be around people. They're very rural.... however, the pile of clippings it was on is full of sparrows, and possibly a squirrel or two, which is what they like to hunt.

He moved below after viewing the pile from above...

Then he stretched his leg... 

We must have watched him for over 10 minutes, trying to identify him from an old illustrated bird book I had just gotten from a library book sale. I don't know if we identified him correctly, but whatever he/she is, they're definitely immature. You could tell from the white tufts of downy feathers on his bottom. 

If anyone can identify him, please let me know!