Alan Murphy / Pine Siskin (Carduelis pinus), British Columbia, Canada

Alan Murphy / Pine Siskin (Carduelis pinus), British Columbia, Canada

Stephen Dalton / Siskin (Carduelis spinus) and three Goldfinches (Carduelis carduelis) at birdfeeder. Sussex, England, UK. March.

Jussi Murtosaari / Eurasian siskin (Carduelis spinus) eating a cone of alder, Uto, Korppoo, Parainen / Lansi-Turunmaa, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finland. October

Alan Murphy / Pine Siskin (Carduelis pinus), New Mexico

Agustin Esmoris / Hooded Siskin (Carduelis magellanica) juvenile feeding on London Rocket (Sisymbrium irio) fruit, Buenos Aires, Argentina

Markus Varesvuo / Flock of Siskins (Carduelis spinus) Sweden September

Markus Varesvuo / Siskin (Carduelis spinus) in the rain, Helsinki Finland

Markus Varesvuo / Siskin (Carduelis spinus) male feeding, Helsinki Finland October

Markus Varesvuo / Siskin (Carduelis spinus) male, Helsinki, Finland, October

Dong Lei / Tibetan Serin (Carduelis thibetana) perched, Gaoligong Mountain National Nature Reserve, Tengchong county, Yunnan Province, China, Asia

Markus Varesvuo / Siskin (Carduelis spinus) perched on thistle seed head, Uto, Finland, August.

Markus Varesvuo / Siskin (Carduelis spinus) feeding on thistle seed head, Uto, Finland, August.

Markus Varesvuo / Siskin (Carduelis spinus) feeding on thistle seeds,Uto, Finland, August.

Hermann Brehm / Siskin (Carduelis spinus) male, Bavaria, Germany, February.

Roger Powell / Male Siskin (Carduelis spinus) perched on birch tree. Longframlington, Northumberland, UK.

Roger Powell / Male Siskin (Carduelis spinus) looking down from a birch tree. Longframlington, Northumberland, UK.

Roger Powell / Male Siskin (Carduelis spinus) perched on birch tree. Longframlington, Northumberland, UK.

Roger Powell / Female Siskin (Carduelis spinus) looking down from a birch tree. Longframlington, Northumberland, UK.

Roger Powell / Female Siskin (Carduelis spinus) looking down from a birch tree. Longframlington, Northumberland, UK.

Roger Powell / Female Siskin (Carduelis spinus) perched on birch tree. Longframlington, Northumberland, UK.

Bernard Castelein / Siskin (Carduelis spinus) portrait, Brasschaat, Belgium, March.

Bernard Castelein / Siskin (Carduelis spinus) on lichen covered branch, Brasschaat, Belgium

Alan Williams / Siskin (Carduelis spinus) male drinking from bird bath in garden, Cheshire, UK, April.

Alan Williams / Siskin (Carduelis spinus) male perched in tree in garden, Cheshire, UK, April.

Alan Williams / Siskin (Carduelis spinus) male perched at top of tree in garden, Cheshire, UK, April.

Alan Williams / Siskin (Carduelis spinus) male perched at top of tree in garden, Cheshire, UK, April.

Alan Williams / Siskin (Carduelis spinus) male perched in tree in garden, Cheshire, UK, April.

Alan Williams / Siskin (Carduelis spinus) male preening perched in tree in garden, Cheshire, UK, March.

Duncan Usher / Eurasian Siskin (Carduelis spinus) group feeding on teasel thistle seeds in winter, Germany

Duncan Usher / European Goldfinch (Carduelis carduelis) and Eurasian Siskin (Carduelis spinus) feeding on teasel thistle seeds in winter, Germany

Peter Cairns / Male Siskin (Carduelis spinus) perched on lichen-covered branch, Cairngorms National Park, Scotland, May.

Peter Cairns / Female Siskin (Carduelis spinus) warning off intruder, Cairngorms National Park, Scotland, May.

Peter Cairns / Male Siskin (Carduelis spinus) perched on lichen-covered branch, Cairngorms National Park, Scotland, May.

Paul Hobson / Siskin (Carduelis spinus) male on lichen covered twig, Scotland, February.

Paul Hobson / Siskin (Carduelis spinus) female on lichen covered twig, Scotland, February.

Paul Hobson / Siskin (Carduelis spinus) male on lichen covered twig, Scotland, February.

Matthew Studebaker / Pine Siskin (Carduelis pinus), Ohio

Oscar Diez / Eurasian Siskin (Carduelis spinus), Castile-La Mancha, Spain

Ralph Martin / Eurasian Siskin (Carduelis spinus) male, Baden-Wurttemberg, Germany

Alan Murphy / Pine Siskin (Carduelis pinus), New Mexico

Alan Murphy / Pine Siskin (Carduelis pinus), Texas

Alan Murphy / Pine Siskin (Carduelis pinus), New Mexico

Jan Wegener / Eurasian Siskin (Carduelis spinus), Berlin, Germany

Steve Knell / Siskin (Carduelis spinus) adult male perched on larch cone, Lancashire, England, UK, March.

Steve Knell / Siskin (Carduelis spinus) adult female perched on larch cone, Lancashire, Engalnd, UK. March.

Steve Knell / Siskin (Carduelis spinus) adult male perched on larch cone, Lancashire, England, UK, March.

Steve Knell / Siskin (Carduelis spinus) adult male perched on larch cone, Lancashire, March

Steve Knell / Siskin (Carduelis spinus) adult male perched on larch cone, Lancashire, England, UK. March.

Steve Knell / Siskin (Carduelis spinus) adult male perched on larch cone, Lancashire, England, UK. March.

Steve Knell / Siskin (Carduelis spinus) adult male perched on larch cone,looking upwards. Lancashire, England, UK. March.

Loic Poidevin / Eurasian siskin (Carduelis spinus) male, on a branch with lichens, West France, March

Loic Poidevin / Eurasian siskin (Carduelis spinus) on a branch with lichens, West France, March

Loic Poidevin / Eurasian Siskin (Carduelis spinus) on a branch West France, January

Loic Poidevin / Eurasian siskin (Carduelis spinus) on ivy, West France, January

Loic Poidevin / Eurasian Siskin (Carduelis spinus) on a log, West France, Januay

Hermann Brehm / Siskin (Carduelis spinus) male in the rain, Germany, February

Markus Varesvuo / Siskin (Carduelis spinus) profile portrait, Uto Finland April

Jim Brandenburg / Pine Siskin (Carduelis pinus) flock taking flight, North America

Mark Hamblin / 2020VISION / Siskin (Carduelis spinus) male at garden pool, Scotland, UK, May. 2020VISION Book Plate.

Alan Williams / Siskin (Carduelis spinus) male feeding on Larch cone, North Wales, UK, March

Kim Taylor / Two Siskins (Carduelis spinus) and a Redpoll (Carduelis flammea) fighting, Surrey, UK, March

Loic Poidevin / Siskin (Carduelis spinus) on thistle. The Vendeen Marsh, French Atlantic Coast, February.

Mark Hamblin / 2020VISION / Siskin (Carduelis spinus) juvenile displaying at garden pool, Scotland, UK, May

Andrew Parkinson / Siskin (Carduelis spinus) female peched on a lichen covered branch, Rothiemurchus Forest, Scotland, UK, April.

Alan Williams / Male Siskin (Carduelis spinus) perched in woodland, North Wales, UK, April

WILLIAM OSBORN / Female Siskin (Carduelis spinus) feeding on Larch cone (Larix decidua) UK

WILLIAM OSBORN / Male Siskin (Carduelis spinus) feeding in Silver birch (Betula pendula) UK

Rod Williams / Red siskin (Carduelis cucullata) male perched, captive, occurs Venezuela, Guyana, Endangered

Donald M. Jones / Pine Siskin (Carduelis pinus) perching on pine cone, western Montana

Andrew Parkinson / Siskin (Carduelis spinus) male peched on a lichen covered branch. Rothiemurchus Forest, Scotland, UK, April (non-ex)

Andrew Parkinson / Siskin (Carduelis spinus) male peched on a lichen covered branch. Rothiemurchus Forest, Scotland, UK, April (non-ex)

Andrew Parkinson / Siskin (Carduelis spinus) portrait of female perched on a lichen covered branch, facing the camera, Rothiemurchus Forest, Scotland, UK, April (non-ex)

Steve Gettle / Pine Siskin (Carduelis pinus), Michigan

Colin Varndell / Adult female Siskin (Carduelis spinus) winter, Dorset, UK, March

Dave Bevan / Male Siskin (Carduelis spinus) perching in Witch hazel (Hamamelis) UK

Alan Williams / Female Siskin (Carduelis spinus) on roadside verge feeding on Dandelion seeds, North Wales, UK, May.

Alan Williams / Male Siskin (Carduelis spinus) on peanut feeder, North Wales, UK, March.

Alan Williams / Male Siskin (Carduelis spinus) on roadside verge feeding on Dandelion seeds. North Wales, UK, May .

Donald M. Jones / Pine Siskin (Carduelis pinus) sitting in flowering crabtree, western Montana

Peter Cairns / naturepl.com / Siskin (Carduelis spinus) female reflected in garden pool, Cairngorms National Park, Scotland, UK, May

Roy Mangersnes / Black-chinned Siskin (Carduelis barbata) pair in scrubland, Tierra Del Fuego, Argentina, South America. November.

Luiz Claudio Marigo / Yellow-faced Siskin (Carduelis yarrellii) Ceará State, Northeastern Brazil. Endangered species

John Cancalosi / Pine siskin (Carduelis pinus) perched on conifer, New York, USA

David Kjaer / Siskin (Carduelis spinus) male perched on teasel head in spring, Gloucestershire, England

David Kjaer / Siskin (Carduelis spinus) male perched on teasel head in spring, Gloucestershire, England

David Kjaer / Siskin (Carduelis spinus) male on 'niger seed feeder' with Goldfinch (Carduelis carduelis) Gloucestershire, England

Andrew Parkinson / Male Siskin (Carduelis spinus) peched on a lichen covered branch, Rothiemurchus Forest, Scotland, UK

Andrew Parkinson / Male Siskin (Carduelis spinus) preparing to perform a threat display by dipping its wings, Rothiemurchus Forest, Scotland, UK

Andrew Parkinson / Siskin (Carduelis spinus) male peched on a lichen covered branch, Rothiemurchus Forest, Scotland, UK

Andrew Parkinson / Male Siskin (Carduelis spinus) peched on a lichen covered branch, Rothiemurchus Forest, Scotland, UK

Steve Knell / Siskin (Cardeulis spinus) male on red peanut bag, Cairngorms National Park, Scotland, April

Steve Knell / Siskin (Cardeulis spinus) male on twig showing aggressive behaviour, Cairngorms National Park, Scotland, April

Steve Knell / Siskin (Cardeulis spinus) on twig in light snow, Cairngorms National Park, Scotland, April

Steve Knell / Siskin (Cardeulis spinus) male with wings drooped, stood on twig, Cairngorms National Park, Scotland, April

Steve Knell / Siskin (Cardeulis spinus) male on twig, Cairngorms National Park, Scotland, April