My initial observation call this bird a female, because I observed the bird in flight and gliding low overhead; long wings. However, because of the negative area of the top and sides of the telephone pole - and the shape of the bird not being able to fill the negative space - this bird must be a male. This bird may appear to be a Cooper's Hawk; however, it happens to be a Goshawk.
10 December 2006 Agua Caliente Park