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 (County bird recorder 1981 to 2007)
Data collected by volunteers for the BTO. Lack, P. 1986 Atlas of wintering birds in Britain and Ireland. T & A.D. Poyser.