Nice shot! I agree with birdied; I would darken the background; it is nicely blurred but I think if it were darker, the bird would "pop" more. The BG must have been a ways behind this bird-to get the DOF you did, with both wings in focus and yet blur the BG is terrific.
Love the Harrier! Separating subject and BG in layers, then you can de-noise and blur the BG and with a mask, you can paint out out part of the blurred layer to give you a nice, popping subject. A gradient layer will also assist.