Tyto alba alba
"A resident far from common . . . in cliffs both inland and on the coast". Thus Mathew, and this is true to-day. A pair recorded as nesting in a little cave on the Mewstone, Skomer, among the seabirds. Has nested also St Margaret's and Caldey. Visits the islands in winter. Often caught in rabbit-traps.
R.M.Lockley, G.C.S.Ingram, H.M.Salmon, 1949, The Birds of Pembrokeshire, The West Wales Field Society