Ismaele Tortella / Tracking shot of a Whooper swan (Cygnus cygnus) family walking, Lofoten, northern Norway, August.

Oscar Dewhurst / Mute swan (Cygnus olor), two cygnets sheltering under parent's wing. Richmond Park, London, England, UK. April.

Oscar Dewhurst / Mute swan (Cygnus olor) swimming with cygnets in misty lake in morning light. Richmond Park, London, England, UK. May.

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

David Pattyn / Mute swan (cygnus olor) family, Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, June

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.

Andrew Parkinson / Mute swan (Cygnus olor) cygnets with head submerged while feeding underwater, with mother watching and helping, Derbyshire, England, UK. June. Highly Commended in the Animal Behaviour category of the...

Cyril Ruoso / Mute swan (Cygnus olor) feeding underwater, Burgundy, France, March.

Cyril Ruoso / Mute swan (Cygnus olor) feeding underwater, Burgundy, France, March.

Cyril Ruoso / Mute swan (Cygnus olor) feeding underwater, Burgundy, France, November.

Cyril Ruoso / Mute swan (Cygnus olor) feeding along riverbed, viewed underwater, Burgundy, France. November.

Cyril Ruoso / Mute swan (Cygnus olor) feeding along riverbed, viewed underwater, Burgundy, France. November.

Cyril Ruoso / Mute swan (Cygnus olor) feeding along riverbed, viewed underwater, Burgundy, France. November.

Andy Rouse / Mute swan (Cygnus olor) feeding at dawn, Cardiff, Wales, UK, March.

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.

Jussi Murtosaari / Whooper swan (Cygnus cygnus) pair in flight in snowy landscape, Finland, November.

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

Andy Rouse / Mute swan (Cygnus olor) stretching in morning light, UK, February.

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.

Wim van den Heever / Whooper swan (Cygnus cygnus) mid flight over the frozen lake, Kussharo, Hokkaido, Japan.

Wim van den Heever / Whooper swan (Cygnus cygnus) portrait, on frozen lake Kussharo, Hokkaido Japan, February.

Wim van den Heever / Whooper swans (Cygnus cygnus) juvenile with adults behind, on frozen Lake Kussharo, Hokkaido, Japan. February.

Gerrit Vyn / Pair of adult Trumpeter Swans (Cygnus buccinator) in flight. Skagit County, Washington. January.

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.

Nick Upton / Mute swan (Cygnus olor) female and a young cygnet foraging in sunset light, Kennet and Avon canal, Caen Hill, Wiltshire, UK, June.

Andy Rouse / Mute swan (Cygnus olor) with wings raised defensively at sunrise, Wales, UK, April.

Andy Rouse / Mute Swan (Cygnus olor) courtship behaviour, Wales, UK, April.

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

Danny Green / Whooper swans (Cygnus cygnus) two in flight, during snowfall, Lake Kussharo, Japan, February

Danny Green / Whooper swan (Cygnus cygnus) in flight in snowfall, Lake Kussharo, Japan, February

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

Martin Gabriel / Mute swans (Cygnus olor) on water, Bavaria, Germany, February.

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.

Pal Hermansen / Aerial view of river and swans, South West Iceland, June 2014.

Markus Varesvuo / Whooper Swan (Cygnus cygnus) standing in snowfall,Hokkaido, Japan, February

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.

Matthew Maran / Mute swans (Cygnus olor) Highgate Ponds, Hampstead Heath, London, UK, February.

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.

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

Jussi Murtosaari / Mute Swans (Cygnus olor) foraging, southwest Finland, February.

David Woodfall / Mute Swans (Cygnus olor) swimming in Worcester city centre, during February 2014 floods, Worcester, England, UK, 10th February 2014.

David Woodfall / Mute Swan (Cygnus olor) pair in flooded agricultural land adjacent to River Severn, 10th February 2014.

Fergus Gill / Whooper Swan (Cygnus cygnus) adult bird in afternoon light. Perthshire, Scotland, March.

Konrad Wothe / Aggressive Mute swan (Cygnus olor) Upper Bavaria, Germany, Europe

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

Jussi Murtosaari / Whooper Swans (Cygnus cygnus) on a frozen lake, Finland, January

Ben Hall / Mute swan (Cygnus olor) stretching its wings backlit at dawn, Poynton, Cheshire, UK, December. Highly honoured in the Bird Category of the Windland Awards of Natures Best Photography Competition 2016...

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.

Sven Zacek,Sven Zacek / Mute Swans (Cygnus olor) resting on ice after sunset. Baltic Sea, northern Estonia, March.

Espen Bergersen / Whooper swan (Cygnus cygnus). Iceland

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

Oscar Dewhurst / Trumpeter swan (Cygnus buccinator) pair on bank. Grand Teton National Park, Wyoming, USA. September.

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

Roger Powell / Mute swan pair (Cygnus olor) mating. Potterick Carr, Doncaster, Yorkshire, UK, March.

Roger Powell / Mute swan pair (Cygnus olor) engaged in courtship. Potterick Carr, Doncaster, Yorkshire, UK, March.

Roger Powell / Mute swan pair (Cygnus olor) engaged in courtship. Potterick Carr, Doncaster, Yorkshire, UK, March.

Loic Poidevin / Black Swans (Cygnus atratus) foraging in water, Marsh of Ile d'Olonne, Vendee, France. July.

Nick Garbutt / Black-necked swan (Cygnus melancoryphus) pair in courtship on upland lake. Torres del Paine National Park, Patagonia, Chile. November 2018.

Nick Garbutt / Coscoroba swan (Cisne coscoroba) female and chicks, swimming in a row. Torres del Paine National Park, Patagonia, Chile. November.

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.

Gabriel Rojo / Coscoroba swan (Coscoroba coscoroba) at nest with eggs. La Pampa, Patagonia, Argentina. February.

Gabriel Rojo / Coscoroba swan (Coscoroba coscoroba) at nest raised above lagoon. La Pampa, Patagonia, Argentina. February.

Gabriel Rojo / Coscoroba swan (Coscoroba coscoroba) nest with clutch of eggs, raised above lagoon. La Pampa, Patagonia, Argentina. February.

Gabriel Rojo / Coscoroba swan (Coscoroba coscoroba) pair nesting on lagoon, one sitting on nest whilst other stands nearby. La Pampa, Patagonia, Argentina. February.

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

Oscar Dewhurst / Mute swan (Cygnus olor) two immature birds taking off from water, on misty morning. Richmond Park, London, England, UK. February.

Oscar Dewhurst / Mute swan (Cygnus olor) cygnet resting. Richmond Park, London, England, UK. April.

Oscar Dewhurst / Mute swan (Cygnus olor) cygnet swimming, cocking head. Barnes, London, England, UK. April.

Bernard Castelein / Mute Swan (Cygnus olor) bathing, Paris, France. November

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.

Mike Read / Mute swan (Cygnus olor), group at sunrise. King's Sedgemoor Drain at sunrise near Greylake, Somerset Levels, England, UK, October 2018

Andy Rouse / Mute swan (Cygnus olor) stretching wings on water. In morning light, Wales, UK. February.