Parus ater britannicus

Common resident, but does not visit islands except isolated record of one remaining Skokholm from 8 Nover 1930 to 6 March 1931.

R.M.Lockley, G.C.S.Ingram, H.M.Salmon, 1949, The Birds of Pembrokeshire, The West Wales Field Society

More about the Coal Tit in Pembrokeshire