I was out hiking in Rockefeller State Park yesterday. It's in the lower Hudson region of NY state. I was in a wide open grassy area bordered by woods about 1 1/2 miles from the Hudson River. There were two birds circling high overhead at about the same height. One was clearly a red-tailed hawk. The other was about the same size. I asumed it was a red tail, too, until I got home and looked at the photos in close up. Now I'm convinced it's something else, but I'm not sure what. Could this be an osprey? If it was, what was it doing hanging out with a red-tailed hawk and hovering over a grassy field?