Nice picture, Like the exposure, whites look great and sharpness is good. Nice background.
I will tempted to remove the dark OOF stuff at the back of the bird. I will also remove one of the catch-lights and try work the eye for more details.
agree with all above, but what I really like besides the stunning bg is that little line of sharp sand pebble across the image.
The shallow dof works so well there
Nice low perspective and a good pose of one of my favorite shorebirds. Agree with Raul's suggestions and the slight rotation, but a lovely image overall.