1). 1906 Great Pool, Tresco, adult, shot, 16th September, photo, now at Isles of Scilly Museum.
(W. R. Ogilvie-Grant, Bulletin of the British Ornithologists' Club 19: 7; W. R. Ogilvie-Grant, Zoologist 1906: 470; F. W. Frohawk, Field 10th Nov., 1906: 823, fig.; J. Clark, Journal of the Royal Institution of Cornwall 17: 135; H. Saunders, British Birds 1: 16; Witherby, 1920-24; Eds., Ibis 1927: 781-782; A. A. Dorrien-Smith, British Birds 33: 113; Penhallurick, 1969; Flood, Hudson & Thomas, 2007: plate 59).
2). 1927 Great Pool, Tresco, seen, 23rd to 28th August.
(Eds., Ibis 1927: 781-782; Eds., British Birds 21: 162; A. A. Dorrien-Smith, British Birds 33: 113; Penhallurick, 1969).
3). 1939 Abbey Pool, Tresco, seen, 7th May.
(A. A. Dorrien-Smith, British Birds 33: 113; B. H. Ryves & D. Valentine, Cornwall Bird Watching and Preservation Society Report 1939: 25; Penhallurick, 1969, 1978: 427).
4). 1975 Great Pool, Tresco, 24th August to 3rd September, found dead, 6th September, photo.
(J. N. Dymond and the Rarities Committee, British Birds 69: 336; Flood, Hudson & Thomas, 2007: plate 59).