Dave Bevan / Flock of Siskins (Carduelis spinus) feeding on a bird table in falling snow, Carmarthenshire, Wales, UK, February.

Dave Bevan / Flock of Siskins (Carduelis spinus) feeding and squabbling on a seed feeder in falling snow, Carmarthenshire, Wales, UK, February.

Dave Bevan / Slow motion clip of a flock of Siskins (Carduelis spinus) feeding and squabbling on a bird feeder in falling snow, Carmarthenshire, Wales, UK, February.

Dave Bevan / Slow motion clip of two Siskins (Carduelis spinus) fighting on a bird feeder, Carmarthenshire, Wales, UK, February.

Thomas Marth/ BIA / Eurasian Siskin (Carduelis spinus) male, Bavaria, Germany

Jussi Murtosaari / Eurasian siskin (Carduelis spinus), male on branch with catkins, Finland, April.

Andy Trowbridge / Female Siskin (Carduelis spinus) perched on lichen covered branch. Southern Norway. August.

Brian Bevan / Male Common redpoll (Carduelis flammea) squabbling with a male Eurasian siskin (Carduelis spinus), Carmarthenshire, Wales, UK, March.

Dave Bevan / Two female Eurasian siskins (Carduelis spinus) squabbling whilst feeding from Alder (Alnus) cones, Carmarthenshire, Wales, UK, February.

Dave Bevan / Male Eurasian siskin (Carduelis spinus) feeding from Alder (Alnus) cones, Carmarthenshire, Wales, UK, February.

Dave Bevan / Male Eurasian siskin (Carduelis spinus) feeding from a bird feeder, Carmarthenshire, Wales, UK, February.

Dave Bevan / Female Eurasian siskin (Carduelis spinus) feeding from a bird feeder, Carmarthenshire, Wales, UK, February.