Fulmarus glacialis – ADERYN-DRYCIN MAWR – Breeding resident
The BTO winter atlas showed that Fulmars were present in most coastal 10km squares during 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 over 216 birds. Fulmars occupy their breeding sites on many days throughout the winter.
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.