I really like the head angle and background here. I don't know what it is though, but the bird and perch appears quite cartoonish to me, almost like a painting. It almost looks like you applied heavy NR directly to the bird itself, rather than just the BG.
No noise reduction on the bird, but this is a heavy crop, and at 1024 px high the detail in the bird isn't holding up well, particularly face and talons.
While I love the files I'm getting out of my D700 (akin to the D3), I find it's only useful for subjects big enough or close enough....the files just don't hold up to heavy cropping.
Side lighting looks a bit harsh and I think this one was just a bit too far away.