Peter & Michelle,
Your nice pics of the upperwing reconfirm this as tundrae Ringed Plover because of the length of the wing bar and primary moult. The white in the wing bar extends to the outer webs of the outer primaries at one end [not just the shafts] and much of the inner secondaries, both features which according to the experts eliminate Semipalmated which has a shorter wing bar. Also unfinished wing moult to the outer primaries is just right for tundrae which doesnt start moulting until about November after reaching its wintering grounds whereas Semipalmated and Little Ringed moult much earlier.
Just goes to show the value of good pics.
Mike Chalmers
