Phalacrocorax aristoltelis aristotelis
Common resident, more numerous than Cormorant. Mathew givew the following breeding stations: Ramsey, Skomer, St Margaret's Island, the channel side of Caldey, and in a cave on the west side of the great Stack. A pair usually breeds at Skokholm and others at Grassholm and Middleholm, and along the whole coast there are scattered pairs.
R.M.Lockley, G.C.S.Ingram, H.M.Salmon, 1949, The Birds of Pembrokeshire, The West Wales Field Society