Ismaele Tortella / White tailed eagle (Haliaeetus albicilla) catching fish, Lofoten, Norway, August.

Nick Garbutt / Black-browed albatross (Thalassarche melanophris) flying over South Atlantic. Cooper Bay, South Georgia. November.

Jordi Chias / Wandering albatross (Diomedea exulans) flying on the open ocean, Drake passage, Antarctic Peninsula, Antarctica.

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

Espen Bergersen / Killer whales / orcas (Orcinus orca). Spyhopping. Kvaloya, Troms, Norway November

Espen Bergersen / Gulls and Killer whales / orcas (Orcinus orca) feeding on herring. Kvaloya, Troms, Norway October

Jack Dykinga / Flocks of Mallard ducks (Anas platyrhynchos) taking off in tree-lined wetlands. Bosque del Apache National Wildlife Refuge, New Mexico, USA.

SCOTLAND: The Big Picture / Turnstones (Arenaria interpres) and Purple sandpipers (Calidris maritima) over wintering on the beaches of the Orkney Isles, Scotland, UK, April.

Oscar Dewhurst / Great bittern (Botaurus stellaris) in flight over water. London, UK. December.

Espen Bergersen / Aerial shot of Killer whale (Orcinus orca) hunting Atlantic herring (Clupea harengus), Troms, Norway, October.

Espen Bergersen / Aerial shot of a pod of Killer whales (Orcinus orca) carousel feeding, Skjervoy, Troms, Norway, November.

Marie Read / Horned Puffin (Fratercula corniculata) flying over a pattern of kelp and sea foam, photographed from above, St. Paul, Pribilof Islands, Alaska, USA. July.

Marie Read / Abstract patterns of reflected sky and clouds on the ocean with a silhouetted Red-faced cormorant (Phalarocorax urile) in flight, St. Paul Island, Pribilof Islands, Alaska, USA, July.

Marie Read / American avocets (Recurvirostra americana) two during aggressive (territorial) encounter, Bear River Migratory Bird Refuge, Utah, USA, May.

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

Juan Carlos Munoz / Griffon vulture (Gyps fulvus) landing on coast next to flock. Cantabria, Spain, March.

John Chan / Black skimmer (Rynchops niger) skimming water surface / feeding, Southern California, USA, July.

Pal Hermansen / Avalanche on Gullemot (Uria aalge) nesting cliff on first day birds return to breed. Finnmark, Norway. March.

Robin Chittenden / Common swift (Apus apus) flying low to water while hunting, Norfolk, England, UK, July. Winner of Animal Behaviour Category of the British Wildlife Photography Awards 2019.

Tui De Roy / Blue-footed booby (Sula nebouxii) diving towards sea, folding wings. Northeast coast, Santiago Island, Galapagos. Sequence 1/2.

Tui De Roy / Blue-footed booby (Sula nebouxii) coming in to land. Punta Vicente Roca, Isabela Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), five diving into sea. Espumilla Beach, Santiago Island, Galapagos.

Juergen Freund / Australian freshwater crocodiles (Crocodylus johnsoni) catching a Little red flying fox (Pteropus scapulatus) flying to drink from a watering hole, Kimberley, Western Australia.

Juergen Freund / Australian freshwater crocodiles (Crocodylus johnsoni) trying to catch Little red flying foxes (Pteropus scapulatus) flying to drink from a watering hole, Kimberley, Western Australia

Nick Garbutt / Red-and-green macaw (Ara chloropterus) flock flying in front of clay lick. Heath River, Tambopata / Bahuaja-Sonene Reserves, Amazonia, Peru / Bolivia border.

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

John Waters / Adult Mayflies (Ephemoptera) in flight, River Kennet, Berkshire, Hungerford, Berkshire, England, UK, June.

Paul Williams / Budgerigars (Melopsittacus undulatus) flocking to find water, Northern Territory, Australia

John Waters / Slow motion clip of a mixed flock of Teal (Anas crecca) and Wigeon (Anas penelope) landing in a lake, Greylake RSPB Reserve, Somerset Levels, England, UK, February.

John Waters / Wide-angle shot of wetland landscape at sunset, with Lapwings (Vanellus vanellus) flying to roost, Ham Wall RSPB Reserve, Somerset Levels, England, UK, February.

Theo Bosboom / Common blue damselflies (Enallagma cyathigerum) group gathering over water, Hondenven, Tubbergen, Netherlands, July.

Theo Bosboom / Common blue damselflies (Enallagma cyathigerum) group reflected flying over water and perching on reeds, Hondenven, Tubbergen, Netherlands, July.

Theo Bosboom / Common blue damselflies (Enallagma cyathigerum) group reflected in water, flying and perching on reeds - they sit on stems and fly around the water, looking for prey and females to mate. The stems ar...

Guy Edwardes / Northern gannet (Morus bassanus), feeding frenzy, Noss NNR, Shetland, Scotland, UK

John Waters / Mixed flock of Wigeon (Anas penelope) and Northern lapwings (Vanellus vanellus) disturbed by hunting Marsh Harrier (Circus aeruginosus), Greylake RSPB Reserve, Somerset Levels, England, UK, December.

Frederique Olivier / Large flock of Guanay cormorants (Phalacrocorax bougainvilli) flying to feed, Ballestas Islands, Peru.

Frederique Olivier / Large flock of Guanay cormorants (Phalacrocorax bougainvilli) flying to feed, Ballestas Islands, Peru.

Frederique Olivier / Wide angle shot of a large flock of Blue footed boobies (Sula nebouxii) taking off from the sea and diving on a bait ball, Isla Lobos de Terra, Peru.

Frederique Olivier / Wide angle shot of a large flock of Blue footed boobies (Sula nebouxii) taking off from the sea and diving on a bait ball, Isla Lobos de Terra, Peru.

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.

Dietmar Nill / Slow motion clip of a pair of Common kingfishers (Alcedo atthis) mating, Germany, April.

Nick Upton / Panning shot of partially flooded pastureland with large flocks of Wigeon (Anas penelope), Lapwings (Vanellus vanellus) and Golden plover (Pluvialis apricaria) in flight, Gloucestershire, England, UK,...

Nick Upton / Panning shot of a flock of Lapwings (Vanellus vanellus) landing on partially flooded pastureland near resting Black-tailed godwits (Limosa limosa) and grazing Wigeon (Anas penelope), Gloucestershire,...

Ingo Arndt / Great frigatebird (Fregata minor listeri) drinking freshwater on the wing, Christmas Island, Indian Ocean, Australian Territory, November

Jack Dykinga / Sandhill crane (Grus canadensis) running to take off into flight, Boque 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.

SCOTLAND: The Big Picture / Gannets (Morus bassanus) diving to feed on discarded fish, Shetland, Scotland, UK, April.

SCOTLAND: The Big Picture / Gannets (Morus bassanus) diving to feed on discarded fish, Shetland, Scotland, UK, April.

SCOTLAND: The Big Picture / Gannets (Morus bassanus) diving to feed on discarded fish, Shetland, Scotland, UK, April.

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

Andy Rouse / Kingfisher (Alcedo atthis) emerging from pool with fish, UK, December.

Bence Mate / Little bittern (Ixobrychus minutus) watching Great warbler (Acrocephalus arundinaceus) with prey, Lake Csaj, Kiskunsagi National Park, Hungary.

Bence Mate / Great egrets (Ardea alba) in winter, and Grey heron (Ardea cinerea) with flock of other birds flying above, Lake Csaj, Kiskunsagi National Park, Hungary. January.

Bence Mate / Great reed warbler (Acrocephalus arundinaceus) taking fish from water, Hungary, June.

Tony Heald / Black skimmer (Rynchops flavirostris) fishing by skimming along water surface, Pantanal, Brazil

Bence Mate / Blackbird (Turdus merula) fighting, splashing water, Pusztaszer, Kiskunsagi National Park, Hungary, April.

Bence Mate / Little bittern (Ixobrychus minutus) flying, splashing water behind, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. June.

Bence Mate / Flock of Mallard ducks (Anas platyrhynchos) taking off, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. December.

Luis Quinta / Great shearwater (Puffinus gravis) in flight, Fonte da Telha Beach, Portugal, October.

Michel Poinsignon / Black headed gull (Chroicocephalus ridibundus) taking off, detail of legs and water droplets, Pusztaszer, Hungary, April

Michel Poinsignon / Grey heron (Ardea cinerea) landing on lake, Pusztaszer, Hungary, April

Espen Bergersen / Gulls (Laridae) seaching for food in water containing blood coming from a large fishing boat, Tromvik, Kvaloya, Troms, Norway, November 2014.

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

Brent Stephenson / Southern royal albatross (Diomedea epomophora) flying over sea, Off Stewart Island, New Zealand, November, Vulnerable species.

Brent Stephenson / Southern royal albatross (Diomedea epomophora) flying low over the sea, off Stewart Island, New Zealand, November, Vulnerable species.

Brent Stephenson / Australasian gannet (Morus serrator) flying with waves breaking below, Muriwai, Auckland, New Zealand, October.

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.

Danny Green / White-tailed eagle (Haliaeetus albicilla) in flight at sunset, Norway, August

Mark MacEwen / Japanese firefly (Luciola cruciata) light trails at night above stream in rural Japan. June.

Roland Seitre / Budgerigar (Melopsittacus undulatus) flock drinking and bathing in water, Wannoo, Billabong Roadhouse, Western Australia.

Sven Zacek / White-tailed sea eagle (Haliaeetus albicilla) flying, and hunting over sea, Norway, July.

George Sanker / Great egret (Ardea alba) taking off with fish prey in mouth, Myakka River State Park, Florida, USA, March.

Andy Rouse / Great egret (Ardea alba) flying across lake, Ranthambhore National Park, India

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

Staffan Widstrand / Common Eurasian buzzard (Buteo buteo) reflected in water whilst drinking, Pusztaszer protected landscape, Kiskunsagi, Hungary, May

Ernie Janes / Fulmar (Fulmaris glacialis) in flight with Hunstanton, Norfolk, England, UK, February.

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

Juergen Freund / Flock of Budgerigars (Melopsittacus undulatus ) drinking in an outback dam, Northern Territory, Australia.

Ole Jorgen Liodden / Campbell albatross (Thalassarche impavida) in flight, silhouetted at sunset, near Campbell Islands, Sub-Antarctic New Zealand. February.

Ole Jorgen Liodden / Campbell albatross (Thalassarche impavida) in flight, silhouetted at sunset, near Campbell Islands, Sub-Antarctic New Zealand. February.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans) flying off coast of South Georgia Island.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), in flight over South Georgia Island, Southern Ocean.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans) flying off coast of South Georgia Island. Silhouetted.

Markus Varesvuo / Black kite (Milvus migrans) flying and red-crowned crane (Grus japonensis) on snow, Hokkaido, Japan, February.

Markus Varesvuo / White-tailed eagle (Haliaeetus albicilla) with two fish in talons, Norway, October.

Jussi Murtosaari / Apollo butterfly (Parnassius apollo) in flight, Foglo, Ahvenanmaa / Aland Islands, Finland, July.

Espen Bergersen / Humpback whales (Megaptera novaeangliae) and Killer whale (Orcinus orca) feeding on a bait ball of Herring. Andfjorden close to Andoya, Nordland, Northern Norway. January.

Espen Bergersen / Humpback whale (Megaptera novaeangliae) with fin above water, Andfjorden close to Andoya, Nordland, Northern Norway. January.