Super pose Jon, and this fellow certainly has an array of colours to look at. You have brought out good detail and the sharpness is spot on. I like the darker BG, and agree with a little more space on the left.
Thanks for the comments everyone. The perch was very messy on the left and I already did some cloning, I did originally try with a little more space on the left but it was proving troublesome to correct. The shot was taken April 22 2010.