I agree, that dark spot is quite distracting--I'd clone that out. Otherwise, it's a really nice shot! I wish that little bit of "tail" on it wasn't so blurred, but that's a pretty small nitpick.
I could easily clone it out if you were interested, the secret is to clone from different spots to make look random. Up to you if you would like me to try.
I really like it! If I had to nit-pick to me it looks like the focus is on the wings, and not the eyes, like I prefer. That may just be my preference though.