[According to the entry for Cooper's hawk in the Birds of North America Online at the Cornell Laboratory of Ornithology website <a href="http://bna.birds.cornell.edu/bna">http://bna.birds.cornell.edu/bna</a> , birds and mammals of medium size, especially robins, jays, northern flicker, starling, doves, and chipmunks, are major prey items of this raptor.