Konrad Wothe / Alpine chough (Pyrrhocorax graculus) group of three in snow, Karwendel, Alps, Upper Bavaria, Germany. April

Konrad Wothe / Alpine chough (Pyrrhocorax graculus) group of three in snow, Karwendel, Alps, Upper Bavaria, Germany. April

Guy Edwardes / Red billed chough (Pyrrhocorax pyrrhocorax) in flight, Great Saltee, County Wexford, Republic of Ireland, June.

Mike Read / Red-billed chough (Pyrrhocorax pyrrhocorax) in flight, South Stack Cliffs RSPB Reserve, Holyhead, Anglesey, Wales, UK, April.

Loic Poidevin / Red billed chough (Pyrrhocorax pyrrhocorax) in field, Island of Islay, Scotland, UK, September

David Tipling / Red-billed chough (Pyrrhocorax pyrrhocorax) head portrait, Belchite Spain July

David Tipling / Red-billed chough (Pyrrhocorax pyrrhocorax) Belchite Spain, July

David Kjaer / Chough (Pyrrhocorax pyrrhocorax) Spain, July

David Pattyn / Alpine chough (Pyrrhocorax graculus) in flight, Bernese Alps, Switzerland, November

David Pattyn / Alpine chough (Pyrrhocorax graculus) group resting in snow, Stelvio National Park, Sudtirol, Italy. March

David Pattyn / Alpine chough (Pyrrhocorax graculus) group resting in snow, Stelvio National Park, Sudtirol, Italy. March

Fabrice Cahez / Red-billed chough, (Pyrrhocorax pyrrhocorax) flock in flight, Gorges du Tarn, France, March.