I shot this picture from the window of my classroom at school while I was watching for the albino Blue Jay that I had spotted earlier. Fortunately, it was flying high in the sky, these birds are known to kill smaller birds at feeders.
It can be easy to confuse a Sharp-shinned hawk with a Cooper's hawk. One indicator is the shape of the tail, if it is squared, it is a Sharp-shinned. The second indicator is the way the head doesn't extend much past the wings.