You nailed the sharpness in the eye Raul! The large area of pink behind the bird really draws the eye away from your subject; I would try to desaturate that area a bit. I would also tone down the perch. The angle of both the bird and the perch emphasize the shallow DOF; I wonder if you could have moved so that you were more square to the perch?
As posted you could crop away about half the empty space above...this would also somewhat help de-emphasize the distracting pink area. If this is a feeder set-up you could find a slightly thinner branch too for these smaller birds. Having said this, this is an extremely cute little fella, and you nailed the exposure!
Thanks all for recommendations, I have to spend more time on my parents backyard in my next trip. The pink (original red) has been de-sat... a lot. The plant is a bush similar to the Poinsettia, the local name is "Pascua eterna", loose translation "Eternal poinsettia", because all year around have dark red flowers, one of my mom favorites plants.