Carduelis spinus – PILA GWYRDD – Breeding resident, winter visitor and passage migrant
The BTO winter atlas showed that Siskins were present in six 10km squares during the winters of 1981-82, 1982-82 and 1983-84.
The darkest blue colour in a 10km square represents 19-50 birds seen in a day, in Pembrokeshire up to 32 birds.
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.