Nick Upton / Greylag goose (Anser anser) landing with its wings and head raised to chase off another from its territory in a marshland pool, Gloucestershire, UK, January.

Bence Mate / Graylag gosling (Anser anser) resting under parent's wing, Pusztaszer, Kiskunsagi National Park, Pusztaszer, Hungary.

Bence Mate / Graylag gosling (Anser anser) resting under parent's wing, Kiskunsagi National Park, Pusztaszer, Hungary.

Bence Mate / Graylag gosling (Anser anser) with parent, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. April.

Bence Mate / Graylag gosling (Anser anser) resting under parent's wing, Pusztaszer, Hungary.

Danny Green / 2020VISION / Greylag Goose (Anser anser) in flight, Caerlaverock WWT, Scotland, Solway, UK, January.

Danny Green / 2020VISION / Greylag Goose (Anser anser) in flight, Caerlaverock WWT, Scotland, Solway, UK, January.

Fergus Gill / 2020VISION / Greylag Goose (Anser anser) calling at dawn with steaming breath. Scotland, December.

David Tipling / 2020VISION / Small flock of Greylag geese (Anser anser) flying over snow covered fields, Ken-Dee Marshes RSPB reserve, Dumfries and Galloway, Scotland, UK, December

Ernie Janes / Greylag geese (Anser anser) in flight with paraglider behind, Cley bank, Norfolk, UK

Mark Hamblin / 2020VISION / Greylag goose (Anser anser) adult on water, Scotland, UK, May 2010

Mark Hamblin / 2020VISION / Greylag goose (Anser anser) pair on edge of loch, near nesting site, Scotland, UK, May 2010

Terry Whittaker / 2020VISION / Greylag geese (Anser anser) flying past electricity pylons into Rainham Marsh RSPB Reserve, Thames Futurescapes Project, Essex, UK, January 2011

Ernie Janes / Greylag Goose (Anser anser) landing on water. Norfolk, UK, Europe, April.

Ernie Janes / Greylag Goose (Anser anser) landing on water. Norfolk, UK, Europe, April.

Edwin Giesbers / A flock of Greylag Geese (Anser anser) flying in formation above misty fields in the 'Ooijpolder' near Nijmegen. This is a delta area near the river Waal, The Netherlands, March.

Fergus Gill / Greylag goose (Anser anser) calling at dawn with its breath showing as a cloud of steam. Serrated tomia (the equivalent of teeth) are visible in its beak. Scotland, Dec .

Andrew Parkinson / Pair of Greylag geese (Anser anser) and chicks spotlit by dawn sunlight near a small weir. Nottinghamshire, UK, May (non-ex)

Robin Chittenden / Greylag goose (Anser anser) on water, Hickling Broad NWT, Norfolk, England, April

Laurie Campbell / Greylag Goose (Anser anser) with goslings, Isle of Rum NNR, Inner Hebrides, Scotland, UK, June

Peter Cairns / naturepl.com / Two Greylag geese {Anser anser} in field, Scotland, UK, June

Wild Wonders of Europe / Peltomäki / Greylag goose (Anser anser) pair with goslings, Texel, Netherlands, May 2009

Wild Wonders of Europe / Unterthiner / Whooper swans (Cygnus cygnus) Canada geese (Branta canadensis) and Greylag geese (Anser anser) in snow, Lake Tysslingen, Sweden, March 2009

Andrew Parkinson / Group of Greylag geese (Anser anser) flying in the half light before dawn, Snettisham RSPB reserve, Norfolk, UK, September

Andrew Parkinson / Greylag goose (Anser anser) on the River Lea, Hackney Marshes, London, England

David Kjaer / Two Greylag geese landing at sunset {Anser anser} UK

Niall Benvie / Greylag goose on water {Anser anser} Linlithgow, Scotland, UK

John Downer / Greylag geese formation flying along coast of Isle of Lewis, Hebrides Scotland

John Downer / Greylag geese flying close-up, Isle of Lewis, Hebrides Scotland

John Downer / Greylag geese formation flying, Isle of Lewis, Hebrides Scotland

John Downer / Greylag geese formation flying, Isle of Lewis, Hebrides Scotland

John Downer / Imprinted Greylag geese flying behind microlite for filming of BBC tv series 'Supernatural', 1998

David Tipling / Greylag goose {Anser anser} head portrait Winter, Scotland

Mike Wilkes / Greylag goose flying, Slimbridge WWT England, UK

David Kjaer / Greylag geese courtship display (Anser anser) Gloucestershire UK

Cyril Ruoso / Greylag Goose (Anser anser) gosling, Austria

Willi Rolfes/ BIA / Greylag Goose (Anser anser) chick, Lower Saxony, Germany

Willi Rolfes/ BIA / Greylag Goose (Anser anser) chick, Lower Saxony, Germany

Oscar Dewhurst / Greylag goose (Anser anser) chasing another greylag away from its territory. Suffolk, England, UK. March

Oscar Dewhurst / Greylag goose ( Anser answer ) standing in marshland. Suffolk, England, UK. March

Oscar Dewhurst / Canada geese (Branta canadensis) and greylag geese (Anser anser) feeding on the edge of a golf course fairway. London, England, UK. July.

Fabrice Cahez / Common crane (Grus grus) and Greylag goose (Anser anser) Lac du Der, Champagne, France, February

David Tipling / Greylag goose (Anser anser) reflected in water. North Norfolk, England, UK. April.

Nick Upton / Greylag goose (Anser anser) group flying over flooded salt marshes bordering the River Severn at high tide, Gloucestershire, UK, February.

Nick Upton / Greylag goose (Anser anser) flying against a blue sky, Gloucestershire, UK, February.

David Pattyn / Greylag goose (Anser anser) backlit on a misty morning Valkenhorst nature reserve, Valkenswaard, The Netherlands May

Staffan Widstrand / Greylag goose (Anser anser) flock on misty morning. Eriksberg, Blekinge, Sweden. May.

Staffan Widstrand / Greylag goose (Anser anser) flock in flight. Hjalstaviken nature reserve, Uppland, Sweden. April.