I cropped it a bit to remove the bright patch in the corner (easy one :)).
I sharpened edges on the subject.
I tinkered with the Brightness and contrast overall and then applied to each disturbing spot.
Blurred a bit the BG.
Removed noise.
Framed.
I hope you like it and do not mind my tinkering with it. Sorry about the frame and signature.
As said in my critic I thought compo would improve by cropping picture a bit and let the gosbeak sit off centered,furthermore no enhancements made,let me know what you think