Love the perch, BG and action. Head could be turned a bit more to you...perhaps fix the nicked wing tip? You could probably get away with a tighter crop as well, but these are minor points on a great image.
Vivaldo, hi, excellent work here. Whites getting a little hot but the details are all there. Pleasingly simple green BG. Perch a little thick, but what can you do? Inspired by this shot, I'm going to use my 1.4x teleconverter next time I'm out shooting passerines in flight.