Podiceps nigricollis – GWYACH YDDFDDU – Scarce and irregular winter visitor. Not recorded between April and July.
Data collected by volunteers for the BTO. Lack, P. 1986 Atlas of wintering birds in Britain and Ireland. T & A.D. Poyser.
Black-necked Grebe – 1980s winter
Pembrokeshire Avifauna 