Really good shot, I like this ibis.
Same as the first comment about the head. This bird has an expression which deserves a little more light on the head. And because the top of the head is a little yellow, it is accentuating the lack of light.
But well, I prefer the natural light I will not discuss the reality.
Excellent wing position and sharpness. The light angle has already been discussed; you could probably lighten those whites quite a bit in post processing.