Image of Cooper's hawk

Description:

I'm pretty sure this is a sharp-shinned hawk but am deferring to those with more experience and knowledge. I had a Sharp-shinned fly up in front of me not 20 feet away about 10 minutes earlier. This shot was at full 600mm so I can't really attest to the scale of size. I have a lot of good shots but these are the best and none really show the end of the tail well. Any help on ID most appreciated.