Charadrius morinellus
Clearly smaller than Golden plover. Easily identified by broad white supercilium, white breast band and rusty brown underparts. Female more richly coloured than male. Winter plumage and juveniles pale, with scaled back and light underparts. Short, broad, rounded tail and slightly rounded wings visible in flight. Reversed sexual roles.
Calls soft and mellow, but far carrying "pit" or "pju". Also "krrrrritpitpit - pit - pit pit pit", starting as a trill and then ending in a long ritardando of "pit"'s.
Wikipedia: map (se also Xeno-canto below)
Birdlife ecology