Fabrice Cahez / Red-billed chough (Pyrrhocorax pyrrhocorax) perched on rock with one on right calling, Gorges du tarn, France, January.

Nick Garbutt / Pair of Red-billed choughs (Pyrrhocorax pyrrhocorax) on a rocky garden wall. High mountain village, Ladakh, northern India.

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.

Rosl Roessner/ BIA / Alpine Chough (Pyrrhocorax pyrrhocorax) trio, Morocco

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

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

Fabrice Cahez / Red-billed choughs (Pyrrhocorax pyrrhocorax) Gorges du Tarn, France, December

Fabrice Cahez / Red-billed choughs (Pyrrhocorax pyrrhocorax) Gorges du Tarn, France, December

Dong Lei / Flock of Red billed choughs (Pyrrhocorax pyrrhocorax) in flight, Basongcuo National Park, Qinghai Tibetan Plateau, China, November.

Fabrice Cahez / Red-billed chough (Pyrrhocorax pyrrhocorax) group perched on rock, Gorges du tarn, France, January.

Konrad Wothe / Yellow-billed Chough (Pyrrhocorax graculus), Alps, Austria

Ian McCarthy / Red billed chough {Pyrrhocorax pyrrhocorax} flying above the Himalayas, Uttararkhand, India

Roger Powell / Red-billed Chough (Pyrrhocorax pyrrhocorax) flying, Andalucia, Spain

Roger Powell / Red-billed Chough (Pyrrhocorax pyrrhocorax) flying, Andalucia, Spain

Roger Powell / Red-billed Chough (Pyrrhocorax pyrrhocorax) flying, Andalucia, Spain

Roger Powell / Red-billed Chough (Pyrrhocorax pyrrhocorax) flock in flight in feeding territory, Andalucia, Spain

Roger Powell / Red-billed Chough (Pyrrhocorax pyrrhocorax) flying, Andalucia, Spain

Dave Watts / Red-billed Chough {Pyrrhocorax pyrrhocorax} Spain

Dave Watts / Red-billed Chough {Pyrrhocorax pyrrhocorax} feeding chicks at nest in ruined building, Spain

Konrad Wothe / Alpine Chough (Pyrrhocorax pyrrhocorax) the Alps, Germany

Mike Potts / Chough (Pyrrhocorax pyrrhocorax) adult feeding fledged youngster on seaweed covered beach. Bardsey Island, Gwynedd, North Wales, UK.

Mike Potts / Chough (Pyrrhocorax pyrrhocorax) adult feeding fledged youngster on seaweed covered beach. Bardsey Island, Gwynedd, North Wales, UK.

Mike Potts / Chough (Pyrrhocorax pyrrhocorax) adult feeding fledged youngster on seaweed covered beach. Bardsey Island, Gwynedd, North Wales, UK.

Lewis Jefferies / Red-billed chough (Pyrrhocorax pyrrhocorax) in flight over the sea along coastline. Cape Cornwall, UK, Atlantic Ocean.

Nick Upton / Red-billed chough (Pyrrhocorax pyrrhocorax) pair collecting nesting material beside eroded sandy cliff, Cornwall, UK, April.

Nick Upton / Red-billed chough (Pyrrhocorax pyrrhocorax) preening wing on coastal cliff, Cornwall, UK, April.

Nick Upton / Red-billed chough (Pyrrhocorax pyrrhocorax) pair perching on coastal cliff as one bird calls, Cornwall, UK, April.

Nick Upton / Red-billed chough (Pyrrhocorax pyrrhocorax) in flight with grass roots in beak for nesting material, Cornwall, UK, April.

Nick Upton / Red-billed chough (Pyrrhocorax pyrrhocorax) walking past eroded sandy cliff with nesting material in beak, Cornwall, UK, April.

Nick Upton / Red-billed chough (Pyrrhocorax pyrrhocorax) in flight, Cornwall, UK, April.

Nick Upton / Chough (Pyrrhocorax pyrrhocorax) perching on rock in coastal grassland and calling, Pembrokeshire, Wales, UK, August.

Mike Read / Three Red-billed choughs (Pyrrhocorax pyrrhocorax) drinking from puddle, Islay, Inner Hebrides, Scotland, UK. December.

Mike Read / Red-billed chough (Pyrrhocorax pyrrhocorax) drinking from puddle, Islay, Inner Hebrides, Scotland, UK. December.

Dave Bevan / Red billed chough (Pyrrhocorax pyrrhocorax) preening and vocalising, Gwynedd, Wales, UK, May.