Ian, it's a very nice pose and you got some great details here but I'm seeing some problems with the image. Like Myer, I'm seeing a lot of magenta on the light areas of the bird and a real blue cast on the gray perch. I'm also seeing a LOT of noise - my guess is that it's due to a large crop...is that right?
You've also blown out the whites in a few small areas so I'd advise opening the image up in RAW format, pulling down the blown highlights so the spike on the histogram goes away. I'd then use the color picker to touch on a neutral gray area and see if you can't get the color balance back to where it should be. Finally, I'd try to lighten up the BG and run some more noise reduction.
You've got a good base image here but there are some definite problems that you could fix and it would really make a huge difference.
Thanks for commenting folks. Actually, it's not that big a crop, but at ISO 1250 I guess I need some more NR. I'll poke around with it some more and see if I can get the color balance right.