I have never seen a hawk this darkly colored. We have many Red-tailed Hawks here in many variations. I believe this one is an Accipiter. The general consensis has been that this is a Cooper's Hawk. I imaged this one in the back yard in rural upstate Columbia County, New York, USA, very close to where New York meets Connecticut and Massachusetts. It would have been nice if the weather conditions were better. Because of the dark gray day, I had to raise the sensitivity up to ISO 1600. I made some adjustments to the shadows and contrast in FastStone. For this image, I used my manual focus Tamron Adaptall-2 Model 55BB SP 500mm f8 Mirror Lens and Tamron Adaptall-2 140f 1.4X Flat Field Teleconverter with attached Tamron Adaptall-2 Pentax K M Mount on Pentax K20D Camera, hand held at the camera with the lens pointed out the opened bathroom window and resting on the window sill, manually focused, Shake Reduction set to 700mm, ISO 1600, f8 on lens, 1/180 sec, with available ambient light. My lens was functioning as a 700mm f11 Mirror Lens.