Aythya marila – HWYADEN BENDDU – Winter visitor and passage migrant. Not recorded in May
The BTO winter atlas showed that Scaups were present in one estuarine, one coastal and two fresh water sites during the winters of 1981-82, 1982-82 and 1983-84.
The darkest blue colour in a 10km square represents up to 13-25 birds seen in a day, in Pembrokeshire up to four birds.
Data collected by volunteers for the BTO. Lack, P. 1986 Atlas of wintering birds in Britain and Ireland. T & A.D. Poyser.