Larus canus – GWYLAN Y GWEUNYDD – Winter visitor
The BTO winter atlas showed that Common Gulls were present in most 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 up to 400 birds in a day.
Found extensively using wet pasture and newly ploughed land but all roosts reported were around the estuaries.
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.