Thanks John.
C3 was ringed in Nov-21. This is the 20th sighting, all from Mai Po Boardwalk.
V1 was just ringed the week before on 17-Apr.
The single yellow flagged Greater Sand Plover is from Eighty Mile Beach, North-west Australia, the hint being that the metal ring is on left tarsus. At Mai Po, we put "everything" on right leg.
Katherine