What a amazing looking bird - not seen one before.
For my personal Taste - I would like to see some more contrast - looks a bit flat - realise you might want to keep the early morning misty feel.
Would have liked to see you get him before he had flown past you - a better head angle and eye contact would also improve dramatically.
Keep them coming - hope to see more of this guy :)
I use lightroom. I found that there was a bit of bright highlights. So recovered that. Then adjusted the black point. Little bit of clarity, just a hint of vibrance (+5 as the colours in the hornbills beak was already saturated). Saturation remained at 0.
In the levels sliders, pulled back the highlight a little bit (-19), dark to (-12), shadows to (-33). The curve was linear. You can take this as indicative. In the raw, it will be easier to see the subtle change better. Hope this helps.
Well I typically do "Gamma correction" on the RGB and then touch the luminosity. I follow the "Ron Reznick" technique. Anything new thing I read, I finally always come back to Ron's method since he has already covered it in a very fundamental way in his e-book.
Meaning, Get R ,G & B move shadow slider to beginning of data, then, get the midtone slider, which would have shifted right, back to the original center point. After R, G & B are done with, bring the luminosity shadow slider also to beginning of data and touch the midtone slider to suit taste.
Then as a second step apply curves as needed.
Now, I did a levels like you mentioned and that looks best. Typically I use curves and hardly any levels. But, I guess here since the data is quite well shifted to the right, Levels works well. The the tweaks on saturation etc I do next.