Anser anser – GWYDD WYLLT – Erratic visitor. Not recorded from July to September
The BTO winter atlas showed that Greylag Geese were present in two 10km squares during the winters of 1981-82, 1982-82 and 1983-84, presumed birds of feral origin.
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.