Ernie Janes / Brent geese (Branta bernicla) flying with moon, Titchwell, Norfolk, UK, December

Marie Read / Canada geese (Branta canadensis) two during territorial fight in early spring, Ithaca. New York, USA

Steve Downer / Close up of a Canada goose gosling (Branta canadensis) sleeping, with other goslings in the background, Birmingham, England, UK, June.

John & Mary-Lou Aitchison / Flock of Barnacle geese (Branta leucopsis) flying over the sea, Islay, Inner Hebrides, Scotland, UK, November.

Pal Hermansen / Barnacle geese (Branta leucopsis) with goslings, swimming past icebergs, Jokulsarlon, Iceland, June.

Pal Hermansen / Barnacle geese (Branta leucopsis) with goslings, Jokulsarlon ice field, Iceland, June.

Gerrit Vyn / Nene / Hawaiian goose (Branta sandvicensis) Hawaii. April. Vulnerable species.

Roger Powell / Small flock of Brent Geese (Branta bernicla) in flight..Texel Island, The Netherlands, Europe

Pal Hermansen / Barnacle geese (Branta leucopsis) with goslings, Jokulsarlon ice field, Iceland, June.

Marie Read / Canada goose (Branta canadensis) adult swimming leading five goslings, Ithaca, New York, USA.

David Tipling / 2020VISION / Barnacle geese (Branta leucopsis) in flight, Solway Firth, Dumfries and Galloway, Scotland, UK, December

David Tipling / 2020VISION / Barnacle geese (Branta leucopsis) taking-off from grazing field, Solway Firth, Dumfries and Galloway, Scotland, UK, December