Main change here is the crop. I've paced the bird to the left of the frame, giving a bit more space to the right...allows the image to "breathe"a little. Limited by pixels here...your original may well be able to be better cropped.
ISSUE 1 - Improve feather detail. Set black and white points for image using a levels adjustment layer.
- Applied shadow/hight tool to shadows at 20% the pull detail from the plumage in shaod on the birds chest.
- then improved eye definition - slected eye using lasso tool and feathered by 3 pixels. Created a cuvers adjustment layer. Didn't touch the curve settings but did changethe blend mode of the layer to "Screen" this gave good eye edge definition.
ISSUE Sharpness - Ran PKSharpner Pro for 800pixel wide image with Medium sharpening.
- flattened image
- converted to sRGB space and the upload to web.
Hope this of use...if so can you please mark as useful..trying to get my gold WS status :o)