Juvenile Sharp-shinned hawk (Accipiter striatus)

Almost positive on ID for several reasons. First is size. When I first saw him, he was sitting on our deck railing, and launched into the pine tree. My immediate thought was "Kestrel". Then "Nope, wrong color". Second is the square tail, and the rounded head. Third is when he launched from the pine tree. His head did not appear to stick out much at all. The Cooper's I've seen seem to have a much longer head in flight. I won't bother me if someone disagrees, though, if they have reasons to.