Chickstarrs
Crowing
The Cooper's hawk is about the size of a large crow. The sharp-shinned is the size of a large robin. The first is much more of a concern for chickens. Chickens are too big (except maybe a small bantam) for a sharp-shinned. The sharp-shinned has a squarish tail compared to the cooper's but that is hard to tell when they are sitting in a tree. The one pictured is an adult but I can't tell which because there is nothing to judge it's size. Both are quite common here and across the US and Southern Canada. I see them quite often although I do see more juvenile Copper's and adult sharp-shinned.Aren't those larger, though?
Sorry for my wordiness.
