Sterna sandvicensis sandvicensis
Bertram Lloyd saw four at Newport, 3/5 June 1928, two same place 29 Sept 1935, and two at Goodwick, 5 July 1934. Two seen between St Ann's Head and Skokholm, 17 Sept 1936, and 2/3 or on 1 May 1947. One Dale, 6 Nov 1936 (R.M.L.)
R.M.Lockley, G.C.S.Ingram, H.M.Salmon, 1949, The Birds of Pembrokeshire, The West Wales Field Society