This is a nice clean shot with very good detail and smooth bg (and it's a bird we never see where we live).
The perch looks a tad crunchy, and a few kinda hot areas could be toned down I think. Maybe a little more room on the left would be nicer too.
I just got here myself btw, but a very good first post I say. :)
Lovely sharp image! Nice background and lots of detail for having used the 2x converter. The crop makes the bird too centered so if you have more canvas around it then place the bird more on the right side so it is looking into the negative space in front. It appears that the whites are a little hot near the bill and the feet. Try burning them a touch.