Podiceps auritus – GWYACH GORNIOG – Sparse winter visitor. Not recorded in June, August and September
The BTO winter atlas showed that Slavonian Grebes were present in some coastal and estuarine 10km squares during the winters of 1981-82, 1982-82 and 1983-84.
The darkest colour for each 10km square represents 2-3 birds seen in a day.
Graham Rees. Pembrokeshire County Bird Recorder 1981-2007