What is this raptor?

The photo below was taken at the coastal grasslands of Stratford Point. It shows a raptor sitting on top of an American Kestrel box.

The picture is small, isn’t it? It is 25% of actual size. It is as if you had nothing but your eyes or possibly a pair of binoculars while watching it. So my question to you is…what is this raptor?! I will post the answer later this week.

Photo © Scott Kruitbosch