Here are three pictures of the sandpiper I identified as a Semipalmated, but more expert observers thought looked like a Baird's. The first picture is the one I posted. The second is one I looked and thought it showed bill shape like Semipalmated -- though I don't have much experience with this species. The third shows the foot with the "toes", and there doesn't look to be any webbing between them. All three show primary extension well beyond the tail.