Help! After a long search through many images and discussions on the internet, I've come to the conclusion this is a Cooper's Hawk. However I've read lots of information that seems to contradict that conclusion. The main reason I think this is a Cooper's Hawk and not a Goshawk: the relatively thinner tail. The white superciliary line, heavy streaking down to the legs, large size seemed to indicate Goshawk at first, but when looking at the only Goshawk photo I've uploaded on Birdviewing, this bird seems different. There is a lot of variability in the images on the internet.