Hi, RE,
I am afraid my confident I.D. as a broad winged hawk may have been more than a touch too confident. I’ve studied it some more and must admit some uncertainty. The tail is banded grey and black, not white and black as a broad wing should be...and the head, cere, and beak conformations are suggestive of those of an accipiter. It’s tail is too tightly closed to judge if it is rounded or squared-of when spread. Gotta consider a large female sharp shinn3d or a small male Cooper’s hawk. Whatever it is, the bright yellow eye iris indicates it is a juvenile.
Another confounding feature is that the two toes seen just just ahead of the base of the tail are rather more robust than would be expected for a sharpie or a Coopers, but more consistent with toes of a Buteo.

Sorry to have to be waffeling...the apparent confidence of my first opinion was unwarranted.

I’m certainly inter3sted in other birders’ opinions!

Dave

I agree it's a juvenile Accipiter (?). Sizes may, and often do, overlap. In my experience size alone is not diagnostic, particularly in the field. The round tail, square tail issue can be subjective and, I believe, should not be considered diagnostic absent other indicators. Some good birders I been with over the years based their identification of Cooper's/Sharp-shinned on overall impression from looking at many birds over their lifetimes. The Sharp-shinned Hawk is more delicate in general impression, the head is smaller in proportion to the body size, tail is shorter, again proportional to body size, and more squared off. All very subjective calls. Over the years the majority of my field records indicate Accipiter (?) because I just couldn't tell. Particularly in a photograph, I am not sure anyone can make a definitive call.