The crow and the hawk

Last week during a stop at Mill Pond Park, I looked up and saw an American Crow (Corvus brachyrhynchos) harassing a Cooper's Hawk (Accipiter cooperii).  As the pair flew past, the crow dove several times after the hawk.  Copper's Hawk's are a predator that specializes in eating other birds and while a crow is probably a little too large for the hawk to handle, crows take no chances and routinely harass any and all hawks they see.