It is a Golden Plover- in winter by its plummage and by the grass colour. In summer, it is an altogether brighter bird. The British Trust for Ornithology has just completed the latest 4 year atlas and the results have yet to be published. So I do not know if it still breeds on Dartmoor. It still breeds in South Wales on a sporadic opportunistic basis.
In the 1988-91 atlas it was confirmed to breed in SX58 and SX68 and to possibly breed in SX 67 and SX 69 (all 10 km squares)
In the same 1988-91 atlas, SX68 had breeding Dunlin- another hill breeding wader.