I like the warmer color balance. I think that the saturation was bumped a little too far though. I'd also do some selective noise reduction in the background. You've got good detail on your subject and a good pose. Just wish the background was a little less cluttered.
Always good to get closer so you don't have to crop so much, which really brings out any problems with noise or sharpness, but I know it isn't always possible. Nice catch of an attractive bird. It looks very sharp and well detailed!
Hi Joaquin, I think Diane gives good advice on your image and being able to get a bit closer would certainly solve a lot of your problems with noise ect,The Wrens we have in the UK are usually territorial so I think its worth spending some time studying the habits of your bird and getting closer without of course upsetting the bird.
Good luck! Keith.