This is the smallest sandpiper in the world. I once had a horrible time trying to identify which was which, but when they are in the clear water, it is much easier because they are not tromping around in the mud. Least Sandpipers are the only peep (small sandpiper) to have yellow legs. They also have the smallest bills and they also carry some rust on the scapulars (shoulder feathers). This was on the shoreline of Blackie Spit on a section of Mud Bay where the Nicomekl River enters the ocean.