Taken in weak diffused light in slight rain, uncropped image. I ran NR on the full image because of heavy grain on feathers and the eye. Levels adjustment. High pass sharpening on bird only.
A very nice image in very difficult conditions.
Good result for Iso 2500.
BG is a bit busy for my taste. I would place the bird lower in the frame so that I'll have less from the rock and some more air above.
I like the angle, pose and eye contact. I agree with Gal regarding putting the bird a bit lower in the frame and might sharpen it a little more. It does look good considering the high ISO.
You managed a nice shot of this sandpiper despite the light rain, less than ideal light and ISO 2500 to boot. Agree with more room on top. Busy backgrounds like this can sometimes be mitigated with an even more wide open aperture and moving in a bit more (if possible only). We have Spotted Sandpipers breeding here and its behaviour varies depending on what it's doing at the time :-)