I think of a ballet dancer when I see this image. Perhaps Swan Lake...in pink! The balancing act of standing on one leg is impressive. He (or she) does seem like it's shading it's face from the outside world.
Very similar to my own image athttp://www.pbase.com/pnd1/image/128753874 -- you build yours around the head of the flamingo, while I choose to abstract the head. Both images work as expression -- the open beak in your picture is the key to the preening activity, while in my image, I leave the head to the imagination of the viewer.