My aunt and uncle have had a family of these birds (2-3 juveniles and occasionally an adult) visiting their yard in Black Forest, CO for the last 2-3 weeks. They show up at some point most days. I got a brief look (sadly, without binoculars) the other day and am quite certain that they are too large to be Sharp-shinned. Am I looking at Cooper's Hawks or Northern Goshawks? The speckled back, uneven tail-bands, and appearance of a light-colored supercilium make me think Goshawks based on Sibley, but I am not sure and would love thoughts. Thanks!