Out of Focus Rejection - please help. Is this out of focus ?

No, I wouldn't go so far as say that it is out of focus. But the bird isn't as sharp as it could be. It's a nice composition.

The focus seems to be perfectly on the eye. Maybe there's another problem. The photo is too small to judge.

Feathers look a bit "wrong". Oversharpened or too much contrast. Another thing are the artefacts in the sky (upper third and close to the cloud).