Branta bernicla – GWYDD DDU – Winter visitor and passage migrant. Not recorded in June or August
The BTO winter atlas showed that Brent Geese were present in two 10km squares during the winters of 1981-82, 1982-82 and 1983-84.
The light colour, of the10km squares represents 1-15 birds seen in a day, the most in Pembrokeshire being six.
Data collected by volunteers for the BTO. Lack, P. 1986 Atlas of wintering birds in Britain and Ireland. T & A.D. Poyser.