I think it would improve the image if you placed the bird more to the left and run NR on the BG. A little head turn would have been good towards you as well. It looks sharp on my laptop screen with detail in the plumage. Thanks for posting.
I would try to darken the whole image a bit more and also some more saturation would help IMO. DOF and sharpness looks great but the head angle and comp are to me, less than ideal, it would be nice to have had more room to where the bird is looking to and also, maybe by doing a noise with your mouth you could've gotten the bird to look at you. BG is nice but I would recomend to brighten the dark area at the top and I would try a different, smaller and more curved perch. :)