Might be slightly over sharpened as I can detect a slight halo, but this could also be due to the lighting at the time. Close examination of the original would answer this, only you know what the whole story is.
A really nice shot, showing the Siskin in its prime.
Discussion
2 repliesD300 600mm f4+1.4 tc
1/350th iso 400
Nice and sharp, but I can see a fine line on the top of the bird's head ?
A really nice shot, showing the Siskin in its prime.