Believe this is the sanderling. I was rather pleased with this photo, these small (about 8 inches tall) beach loving birds are always on the move. My copy of the National Geographic Society "Field Guide to the Birds of North America" describes the sanderling, as a sandpiper, that "feeds on sandy beaches, sprinting just out of surf's reach to snatch up mollusks and crustaceans exposed by the retreating waves." I'll say they sprint! LOL
*This photo was not cropped, it was re-sized, but, not cropped. Yep, I got rather close, and the Sony's zoom got me closer still.