We can ID this sandpiper as a nonbreeding Red-necked Stint by its short straight black bill, dark legs, pale grey-brown above, off-white below and dorsal feathers with dark shafts and pale fringes. The Red-necked Stilton in the first photo still has some of the rufous color towards the rear of the breeding bird.
The Red-necked Stilt is a new species to our Photographic Life List, which now stands at 664.