Since the printing of the current ed. of Collins, Redpoll has been split into three separate species: 1. COMMON REDPOLL Carduelis flammea (which are from northern scandinavia) 2. LESSER REDPOLL Carduelis cabaret (which are from southern scandinavia, and western/central Europe) and the default species in the UK 3. ARCTIC REDPOLL Carduelis hornemanni (as the name implies from arctic/n.scandinavia).
To make matters even more confusing, there are also 3 races of Common Redpoll: (Divided by range rather than split in separate species!)
Additionally COMMON REDPOLL, Carduelis flammea (since the split) is further divided into three races, namely Mealy Redpoll (Carduelis flammea flammea), which breed in a broad band across Scandinavia, the Baltic Republics south to east Germany and Poland, USSR and North America; (This is the one you're likely to see here with the Lesser Redpolls in winter). Greenland Redpoll (Carduelis flammea rostrata) from Greenland and Baffin Island and Icelandic Redpoll (Carduelis flammea islandica) from Iceland.