I'm fairly confident this is a juvenile Cooper's Hawk. Distinguishing between a Cooper's and Sharp-shinned can be frustrating especially with the juveniles. However, after consulting several references and looking at some of my previous hawk photos, I'm going with Cooper's. If I'm wrong it certainly wouldn't be the first time. I watched this one make three attacks on the feeders one afternoon and each attempt was unsuccessful. Because of the trees and fence in the back yard there's not a lot of room for a bird of this size to maneuver.
Cooper's Hawk (Juvenile)1/160 sec. f/16 ISO 1000
Cooper's Hawk (Juvenile)1/160 sec. f/18 ISO 1000
Linking to Wild Bird Wednesday