Aythya nyroca nyroca
One shot Pembroke, 28 Dec 1900 (J.Wynne), and at Orielton Decoy 4 Feb 1937 (H.A.Gilbert)
R.M.Lockley, G.C.S.Ingram, H.M.Salmon, 1949, The Birds of Pembrokeshire, The West Wales Field Society