Jack Dykinga / Sandhill cranes (Antigone canadensis) and Snow geese (Chen caerulescens) at sunrise, Bosque del Apache National Wildlife Refuge, New Mexico, USA, November.

Jack Dykinga / Bald eagle (Haliaeetus leucocephalus) perched as Snow geese (Chen caerulescens) fly by, Bosque del Apache National Wildlife Refuge, New Mexico, USA, January.

Jack Dykinga / Snow goose (Chen caerulescens) landing into a tight packed flock on lake, Bosque del Apache National Wildlife Refuge, New Mexico, USA. January.

Jack Dykinga / Snow goose (Chen caerulescens) landing into flock, Bosque del Apache National Wildlife Refuge, New Mexico, USA, January.

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

Markus Varesvuo / White-fronted goose (Anser albifrons) and Taiga bean goose (Anser fabalis rossicus) flocks in flight and on water. Latvia. April.

David Tipling / Pink-footed geese (Anser brachyrhynchus) flying against strong northerly wind off Salthouse North Norfolk, wind turbines in sea in background, England, UK. November

David Allemand / Two Snow geese (Anser caerulescens) during migration, with dark clouds against the sun, Quebec, Canada, October.

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

SCOTLAND: The Big Picture / Panning shot of a large flock of Pink-footed geese (Anser brachyrhynchus) taking off from their roosting site, Montrose, Angus, Scotland, UK, November.

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

Jack Dykinga / Snow geese (Chen caerulescens) large flock with some landing, Bosque del Apache, New Mexico, USA, December.

Jack Dykinga / Snow geese (Chen caerulescens) in flight in front of super moon, Bosque del Apache National Wildlife Refuge, New Mexico, USA, December.

Jack Dykinga / Sandhill cranes (Grus canadensis) and Snow geese (Chen caerulescens) Bosque del Apache National Wildlife Refuge, New Mexico, USA, December.

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.

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.

Gerrit Vyn / Greater snow geese (Chen caerulescens) taking flight at sunset during migration. Montezuma National Wildlife Rescue, New York, USA. March.

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 Pattyn / Canada goose (Branta canadensis) group of adults with young chicks. The Netherlands. June 2014

David Pattyn / Canada goose swimming portrait (Branta canadensis) The Netherlands. March 2013.

Jack Dykinga / Snow geese (Anser caerulescens) flying toward their gathering pond, with moon in the background, Boque del Apache National Wildlife Refuge, New Mexico. December.

Sergey Gorshkov / Snow geese (Chen caerulescens caerulescens) taking off, Wrangel Island, Far Eastern Russia, June.

Sergey Gorshkov / Snow goose (Chen caerulescens caerulescens) brooding chicks, with rusty orange face from iron rich soil in which it forages. Wrangel Island, Far Eastern Russia, June.

Sergey Gorshkov / Arctic fox (Vulpes lagopus) with Snow goose egg in mouth, mid moult from winter to summer fur, Wrangel Island, Far Eastern Russia.

Sergey Gorshkov / Arctic fox (Vulpes lagopus) with Snow goose egg in mouth, mid moult from winter to summer fur, Wrangel Island, Far Eastern Russia, June.

Sergey Gorshkov / Arctic fox (Vulpes lagopus) with Snow goose egg in mouth, mid moult from winter to summer fur, Wrangel Island, Far Eastern Russia, June.

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

Jack Dykinga / Sandhill crane (Grus canadensis) landing in icy pond filled with snow geese (Chen caerulescens) Bosque del Apache, New Mexico. January 2013

Sven Zacek,Sven Zacek / Two bull Moose (Alces alces) sizing each other up during the annual rut, after sunset with migrating geese in flight. Western Estonia, September.

Bernard Castelein / Canada goose (Branta canadensis) goose reflected in drain canal, in mist at dawn. Groot Schietveld, Wuustwezel, Belgium. May 2010.

Hanne & Jens Eriksen / Lesser white-fronted goose (Anser erythropus), three standing in grass on golf course. Oman, November 2017.

Dong Lei / Bar headed goose (Anser indicus) flock standing at water's edge. Sanjiangyuan National Nature Reserve, Qinghai Province, Qinghai-Tibet Plateau. August.

Dong Lei / Bar headed goose (Anser indicus) flock standing at water's edge. Sanjiangyuan National Nature Reserve, Qinghai Province, Qinghai-Tibet Plateau. August.

Tony Heald / Canada goose (Branta canadensis), two males fighting over territory, UK. April.

Nick Upton / Male Common European Crane fly / Daddy long legs (Tipula paludosa) recently emerged and resting on Goose grass / Cleavers (Galium aparine) by a pond, Suffolk, UK, May.

Nick Upton / Greylag goose (Anser anser) pair swimming with four goslings on a lake, Gloucestershire, UK, April.

Nick Upton / Greylag goose (Anser anser) emerging from a lake with its brood of six goslings following, Gloucestershire, UK, April.

John Shaw / Canada Goose (Branta canadensis) in flight. Gilbert Water Ranch, Arizona, USA. January.

Robin Chittenden / Greylag goose (Anser anser), two on water, exhibiting aggression. Norfolk, England, UK. April.

Ernie Janes / Brent geese (Branta bernicla) in swimming in creek, Norfolk, England, UK, March.

Heather Angel / Bar headed geese (Anser indicus), four in flight, one calling. Coming in to land at breeding site, Qinghai Lake, Qinghai Province, China.

Staffan Widstrand / Hawaiian Goose, or Nene (Branta sandvicensis) Maui, Hawaii. Endemic.

Staffan Widstrand / Hawaiian Goose, or Nene (Branta sandvicensis) Maui, Hawaii. Endemic

Nick Upton / Greylag goose (Anser anser) family walking and grazing on the margin of a lake, Gloucestershire, England, UK, April.

Nick Upton / Pair of Greylag geese (Anser anser) and chicks swimming in a line to emerge from a lake, Gloucestershire, England, UK, April.

David Woodfall / Barnacle Geese (Branta leucopsis) on machair. North Uist, Outer Hebrides, Scotland, UK, March.

David Woodfall / Barnacle Geese (Branta leucopsis) and sheep on machair. Berneray, Outer Hebrides, Scotland, UK, March.

David Woodfall / Barnacle Geese (Branta leucopsis) and sheep on machair. Berneray, Scotland, Outer Hebrides, UK, March.

David Woodfall / Greylag goose (Anser anser) grazing amongst cattle on machair, Berneray, Outer Hebrides, Scotland, UK, March.

Jack Dykinga / Bald eagle (Haliaeetus leucocephalus) perched as Snow geese (Chen caerulescens) fly by, Bosque del Apache National Wildlife Refuge, New Mexico, USA, January.

John Shaw / Snow goose (Chen caerulescens) about to land. Bosque del Apache National Wildlife Refuge, New Mexico. USA, January.

Andy Rouse / Canada Goose (Branta canadensis) pair with young. UK. May.

Rod Williams / Emperor goose (Chen canagica) portrait, captive. Occurs in Alaska and Siberia.

SCOTLAND: The Big Picture / Barnacle goose (Anser brachyrhynchus) flock in flight with Paps of Jura in background, Islay, Scotland, UK, March.

SCOTLAND: The Big Picture / Barnacle geese, (Branta leucopsis) , flock in flght over farmland, Islay, Scotland, UK., March

SCOTLAND: The Big Picture / Barnacle geese, (Branta leucopsis) , flock grazing on croft land, Islay, Scotland, UK., March

SCOTLAND: The Big Picture / White-fronted goose (Anser albifrons) small group silhouetted at sunset, Islay, Scotland, UK., March

SCOTLAND: The Big Picture / White-fronted goose (Anser albifrons) small group silhouetted at sunset, Islay, Scotland, UK., March

SCOTLAND: The Big Picture / Greylag Geese (Anser anser) two birds in flight at dawn, Scotland, UK.November

SCOTLAND: The Big Picture / Greylag Geese (Anser anser) two silhouetted at dawn against moon, Scotland, UK.November

Loic Poidevin / Brant goose (Branta bernicla) Vendee, France, January.

Marie Read / Snow Geese (Chen caerulescens) large flock in pool at Bosque Del Apache National Wildlife Refuge with setting full moon at sunrise in December, New Mexico, USA. December.

Marie Read / Bird photographers line up at sunrise to photograph mass takeoffs of overwintering Snow geese (Chen caerulescens), Bosque Del Apache National Wildlife Refuge, New Mexico, USA. December 2017.

Nick Upton / Bewick's swan (Cygnus columbiana bewickii) sliding on ice as it lands on a frozen marshland pool with other swans and Canada geese (Branta canadensis) in the background, Gloucestershire, UK, Febru...

Nick Upton / Canada goose (Branta canadensis) sliding on ice as it lands on a frozen marshland pool, Gloucestershire, UK, February.

Nick Upton / Canada goose (Branta canadensis) sliding on ice past others watching it as it lands on a frozen marshland pool, Gloucestershire, UK, February.

Suzi Eszterhas / Canada Goose (Branta canadensis) Young gosling (less than one-week-old) International Bird Rescue, Fairfield, California. Captive - rescued and in rehabilitation

David Pattyn / Greylag goose (Anser anser) on a misty morning, Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, March

Ernie Janes / Mute swan (Cygnus olor) attacking Canada goose (Branta canadensis) watched by Coots (Fulica atra) Fleet lagoon, Dorset, England, UK, June.

Markus Varesvuo / White-fronted goose (Anser albifrons) in flight, viewed from below. Latvia. April.

George Sanker / Canada goose ( Branta canadensis), two on Yellowstone River in morning mist. Yellowstone National Park, Wyoming, USA. September.

Nick Upton / Migrating flock of Greater white-fronted geese (Anser albifrons) flying overhead, Lake Peipsi, Estonia, April.

David Tipling / Pink-footed goose (Anser brachyrhynchus) with injured wing after being shot. Holkham, Norfolk, England, UK. October.

Nick Upton / Group of White fronted geese (Anser albifrons) drinking from a freshwater pool on flooded pastureland, Gloucestershire, England, UK, March.

Ann & Steve Toon / Barnacle geese (Branta leucopsis) in flight, Caerlaverock WWT reserve, Dumfries & Galloway, Scotland, October

Nick Upton / Greylag goose (Anser anser) flapping its wings in blowing snow, Gloucestershire, UK, February.

Nick Upton / Flock of Barnacle geese (Branta leucopsis) and a single Red-breasted goose (Branta ruficollis) drinking from a freshwater pool on a saltmarsh bordering the Severn estuary, Gloucestershire, UK, Februar...

Nick Upton / Barnacle geese (Branta leucopsis) taking off as a hunting Red fox (Vulpes vulpes) stands on the saltmarsh they were resting on, Severn estuary, Gloucestershire, UK, February.

Nick Upton / Barnacle geese (Branta leucopsis) taking off as a hunting Red fox (Vulpes vulpes) walks across the saltmarsh they were resting on, Severn estuary, Gloucestershire, UK, February.

Nick Upton / Canada goose (Branta canadensis) in flight overhead, Gloucestershire, UK, February.

Staffan Widstrand / Wild Wonders of China / Group of Swan geese (Anser cygnoides) on grassland, Inner Mongolia, China

Staffan Widstrand / Wild Wonders of China / Swan geese (Anser cygnoides) flying, Inner Mongolia, China

Staffan Widstrand / Wild Wonders of China / Swan geese (Anser cygnoides) flying, Inner Mongolia, China

Staffan Widstrand / Wild Wonders of China / Group of Swan geese (Anser cygnoides) resting on ground, Inner Mongolia, China

David Fleetham / Road sign warning drivers that Nene goose (Branta sandvicensis), are found in the area. East end of Molokai, Hawaii. July 2017.

David Tipling / Greater white-fronted goose (Anser albifrons) in snow, Salthouse North Norfolk, England, UK. February

David Tipling / Greater white-fronted goose (Anser albifrons) in snow, Salthouse North Norfolk, England, UK. February

David Tipling / Pink-footed geese (Anser brachyrhynchus) feeding in harvested sugar beet field in torrential rain and 50 mph winds, Salthouse North Norfolk, England, UK. November

David Tipling / Pink-footed geese (Anser brachyrhynchus) feeding in harvested sugar beet field, Salthouse North Norfolk, England, UK. November