Gavia stellata – TROCHYDD GYDDFGOCH – Winter visitor and passage migrant. Recorded in every month except June
The BTO atlas covering the winters of 1981-82, 1982-82 and 1983-84
The darker the colour, the higher the relative total count for each 10km square. The darkest blue represents 8+ birds, with the highest count being 16 seen at Strumble.
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.