Carduelis spinus

Regular but not numerous visitor to alder beds and riversides in October to March.  Probably increasing, since Mathew has only one definite record (of c.20 in an alder bed at Stone Hall, Dec 1866).

R.M.Lockley, G.C.S.Ingram, H.M.Salmon, 1949, The Birds of Pembrokeshire, The West Wales Field Society

More about the Siskin in Pembrokeshire