Podiceps grisegena – Gwyach Yddfgoch – Scarce winter visitor. Not recorded between May and August
The BTO winter atlas showed that single Red-necked Grebes were noted in one estuarine and three coastal 10km squares during the winters of 1981-82, 1982-82 and 1983-84.
Graham Rees. Pembrokeshire County Bird Recorder 1981-2007
Data collected by volunteers for the BTO. Lack, P. 1986 Atlas of wintering birds in Britain and Ireland. T & A.D. Poyser.