The wing position bothers me a little. If I had a mobile of a bird hanging from the ceiling, this is the exact wing position i would be in. I think that takes a tiny bit away from the "natural look." Otherwise, I agree with eye contact, exposure, bg.
I think the wing postition works well here Axel.
I love the detail that you can see througout this image. Stunning.
As mentioned the eye contact and bg send this one over the top.
Great job.