For my tastes, here is the processing I like on the image:
Topaz Denoise (a light pass to remove most noise, but leave all details)
Topaz Re-Mask (separate bird from background)
Topaz Adjust on background layer to darken BG
Shadow/Highlight tool on bird to lighten face
Smart Sharpen on bird to make details pop
Bit of eraser to clean edges
Topaz Re-Mask to isolate eyes
Denoise (on eye)
Sharpness (on eye)
Contrast (on eye)
Hue/Saturation (on eye, colorize to yellow/orange, then fade filter)
Darken BG to taste
Topaz De-Noise (on BG, heavy pass to make everything buttery smooth)
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