Hi, Nice to see a bird that isn't a robin at the moment!
I think the blackbird could have filled the frame a little more as its got the title role. Probably this was at the long end of the lens so you couldnt get nearer but possibly crop it in a bit now.
Also there seems to be a twig/branch running through the mddle of the bird which is slightly distracting, could that be cloned out a bit?
Great depth of field, i am by no means an expert but hope the comments help