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

Pal Hermansen / Close up of Goshawk (Accipiter gentilis) feathers, with one foot held up, Trondelag, Norway. Winner of the Attention to Detail Category of the Bird Photographer Competition 2019.

Staffan Widstrand / Tawny eagle (Aquila rapax) in flight, about to land, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa

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

Ernie Janes / Bald eagle (Haliaeetus leucocephalus) portrait, captive, occurs in North America.

Winfried Wisniewski / Black Kite (Milvus migrans) flying, Castile-La Mancha, Spain

SCOTLAND: The Big Picture / Golden eagle (Aquila chrysaetos) adult with nest material on eyrie with chick showing background, Isle of Lewis, Scotland, UK., May.

David Pattyn / Bearded vulture (Gypaetus barbatus) in flight over winter landscape with snow, Leukerbad, Vallais, Wallis, Switzerland, January

David Pattyn / Bearded vulture (Gypaetus barbatus) in flight over winter landscape with snow, Leukerbad, Vallais, Wallis, Switzerland, January

David Pattyn / Golden eagle (Aquila chrysaetos) in flight in front of a vertical rocky mountain side, Gran Paradiso National Park, Aosta Valley, Italy, May

Alan Murphy/ BIA / Harris' Hawk (Parabuteo unicinctus) flying, Texas

David Gallan / Slow motion clip of a Wedge-tailed eagle (Aquila audax) landing in nest, Mimosa National Park, New South Wales, Australia , September.

Staffan Widstrand / Golden eagle (Aquila chrysaetos) perched in snow covered tree. Kalvtrask, Vasterbotten, Lapland, Sweden. January.

Staffan Widstrand / Golden eagle (Aquila chrysaetos) in flight over snow. Kalvtrask, Vasterbotten, Lapland, Sweden. January.

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

Sven Zacek / White-tailed sea eagle (Haliaeetus albicilla) flying over frost and snow covered forest. Tartumaa, Southern Estonia. January 2011.

David Perpinan / Group of Griffon vultures (Gyps fulvus) fighting to feed on a dead lamb. Cuenca, Spain, August.

David Perpinan / Group of Griffon vultures (Gyps fulvus) arriving and feeding on a dead lamb, Cuenca, Spain, August.

Nick Garbutt / Bearded vulture (Gypaetus barbatus) in flight with the out-of-focus moon behind. Ladakh, Himalayas, northern India.

Staffan Widstrand / Wild Wonders of China / Chinese Sparrowhawk (Accipiter soloensis) flying Guangshui, Hubei province, China. July.

Guy Edwardes / African fish eagle (Haliaeetus vocifer), Savuti, Botswana.

Sergey Gorshkov / Northern goshawk (Accipiter gentilis) flying with squirrel prey, Finland . March

Sergey Gorshkov / Northern goshawks (Accipiter gentilis) fighting over squirrel carcass, Finland, March.

Danny Green / Bald eagle (Haliaeetus leucocephalus) in flight, Alaska, USA, February

Danny Green / Bald eagle (Haliaeetus leucocephalus) head portrait, Alaska, USA, February

Danny Green / Bald eagle (Haliaeetus leucocephalus) in flight, Alaska, USA, February

Markus Varesvuo / Golden eagle (Aquila chrysaetus) landing, Kuusamo, Finland, January.

Markus Varesvuo / Golden eagle (Aquila chrysaetus) Kuusamo, Finland, January.

Alan Murphy/ BIA / Red-tailed Hawk (Buteo jamaicensis) flying, Texas

Michel Roggo / View of African fish eagle (Haliaeetus vocifer),from underwater, trying to catch a fish on the surface, Okavango Delta, Botswana, June. Photographed for The Freshwater Project

Graeme Guy/ BIA / Eastern Osprey (Pandion cristatus) parent feeding chick in nest, Western Australia, Australia

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.

Ann & Steve Toon / African fish eagle (Haliaeetus vocifer) flying, Zimanga Private Game Reserve, KwaZulu-Natal, South Africa.

Christophe Courteau / White backed vulture (Gyps africanus) feeding, Linyanti Game Reserve, Botswana.

SCOTLAND: The Big Picture / Female Golden eagle (Aquila chrysaetos) feeding its chick in a nest in a pine tree, Glen Tanar, Cairngorms National Park, Scotland, UK, June.

Tui De Roy / Galapagos hawk (Buteo galapagoensis) landing, Galapagos, Ecuador. Vulnerable species.

Tui De Roy / Galapagos hawk (Buteo galapagoensis) in flight, Galapagos, Ecuador. Vulnerable species.

Tui De Roy / Galapagos hawk (Buteo galapagoensis) perched over sulphurous slope, Galapagos, Ecuador. Vulnerable species.

Francisco Marquez / Griffon vultures (Gyps fulvus) and European black vultures (Aegypius monachus) feeding on a dead deer, Cabaneros National Park, Montes de Toledo, Spain, May.

Francisco Marquez / Juvenile Lammergeier (Gypaetus barbatus) feeding on a bone in snow, Ordesa y Monte Perdido National Park, Spain, April.

Ron Bielefeld/ BIA / Swallow-tailed Kite (Elanoides forficatus) flying, Florida

Alain Ghignone/ BIA / Montagu's Harrier (Circus pygargus) male landing, Andalusia, Spain

Hans Glader/ BIA / Griffon Vulture (Gyps fulvus) group, Spain

Oscar Diez/ BIA / Bonelli's Eagle (Hieraaetus fasciatus) female feeding on prey, Andalusia, Spain

Peter Hering/ BIA / Scissor-tailed Kite (Chelictinia riocourii) flying, Senegal

Thomas Hinsche/ BIA / Common Buzzard (Buteo buteo) during snowfall, Saxony-Anhalt, Germany

Thomas Hinsche/ BIA / Common Buzzard (Buteo buteo) pair fighting, Saxony-Anhalt, Germany

Alain Ghignone/ BIA / Red Kite (Milvus milvus) flying, Castile-La Mancha, Spain

Alain Ghignone/ BIA / Red Kite (Milvus milvus) flying, Castile-La Mancha, Spain

Nate Chappell/ BIA / Savannah Hawk (Buteogallus meridionalis) juvenile flying, Pantanal, Brazil

Thomas Hinsche/ BIA / Common Buzzard (Buteo buteo) landing, Saxony-Anhalt, Germany

Thomas Hinsche/ BIA / Common Buzzard (Buteo buteo) pair fighting, Saxony-Anhalt, Germany

David Tipling / Bearded vulture (Gypaetus barbatus) adult swallowing leg bone along with hoof, Spanish Pyrenees, July. This bird swallowed five of these leg bones whole, they have the ability to dissolve the bone in...

Juergen & Christine Sohns / Common Buzzard (Buteo buteo) in winter, Zdarske Vrchy, Bohemian-Moravian Highlands, Czech Republic

David Kjaer / Griffon vulture (Gyps fulvus) coming in to land, Spain, July

David Kjaer / Bearded vulture (Gypaetus barbatus)) coming in to land, Spain, July

Luke Massey / Black kites (Milvus migrans) flying above man as he throws food skyward from a rooftop. Old Delhi, India. February 2016. Finalist in the Urban category of the Wildlife Photographer of the Year Awards...

Neil Aldridge / African fish eagle (Haliaeetus vocifer) flying, Selinda Spillway, northern Botswana.

Neil Aldridge / African fish eagle (Haliaeetus vocifer) standing on the banks of the Chobe River, Chobe National Park, Botswana.

Neil Aldridge / White-backed vultures (Gyps africanus) feed on a wildebeest carcass, Chobe, Botswana, August.

Neil Aldridge / Martial eagle (Polemaetus bellicosus) preening itself after a summer rainstorm in the central district, Kruger National Park. South Africa. Vulnerable species.

Peter Cairns / Golden eagle (Aquila chrysaetos) feeding on red deer carcass, Assynt, Scotland. Highly commended in the Habitat category of the BWPA (British Wildlife Photography Awards) 2016.

Bence Mate / Juvenile White tailed sea eagles (Haliaeetus albicilla) fighting for fish in mid air, Lake Csaj, Kiskunsagi National Park, Hungary. February.

Bence Mate / White tailed sea eagle (Haliaeetus albicilla) interacting with Great egret (Ardea alba) Lake Csaj, Kiskunsagi National Park, Hungary. January.

Bence Mate / Hooded crow (Corvus cornix) mobbing Buzzard (Buteo buteo) Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / White tailed eagles (Haliaeetus albicilla) juveniles in flight, Lake Csaj, Kiskunsagi National Park, Hungary. January.

Bence Mate / Herring gull (Larus argentatus) mobbing White tailed sea eagle (Haliaeetus albicilla) with fish prey, Lake Csaj, Kiskunsagi National Park, Hungary. March.

Bence Mate / Two Buzzards (Buteo buteo) fighting, Lake Csaj, Kiskunsagi National Park, Hungary. February.

Bence Mate / White tailed eagle (Haliaeetus albicilla) with fish in beak , Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Gull mobbing White tailed sea eagle (Haliaeetus albicilla) with fish prey, Lake Csaj, Kiskunsagi National Park, Hungary. March.

Bence Mate / White tailed eagle (Haliaeetus albicilla) juvenile feeding on fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Bence Mate / White tailed sea eagle (Halieetus albicilla) juvenile and adult calling on lake shore, Lake Csaj, Kiskunsagi National Park, Hungary. February.

Bence Mate / White tailed sea eagle (Haliaeetus albicilla) and Hooded crow (Corvus cornix) in snow, Lake Csaj, Kiskunsagi National Park, Hungary. January.

Bence Mate / Juvenile White tailed eagle (Haliaeetus albicilla)in flight, with Hooded crow (Corvus cornix) mobbing it, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / White tailed eagles (Haliaeetus albicilla) two juveniles fighting in flight, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / White tailed eagle (Haliaeetus albicilla) juvenile feeding on fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Brais Seara Fernandez/ BIA / Griffon Vulture (Gyps fulvus), Castile-Leon, Spain

David Pattyn / Martial eagle (Polemaetus bellicosus) perched on a branch. Masai Mara National Reserve, Kenya, Africa, August.

David Pattyn / Bearded vulture (Gypaetus barbatus) flying, Leukerbad, Valais, Switzerland, February

Ingo Arndt / Osprey (Pandion haliaetus) on nest in lake, Blue Cypress Lake, Florida

Ingo Arndt / Osprey (Pandion haliaetus) pair at nest, Blue Cypress Lake, Florida

Ingo Arndt / White-backed Vulture (Gyps africanus) landing, Masai Mara, Kenya

Ingo Arndt / Osprey (Pandion haliaetus) flying, Sanibel Island, Florida

Espen Bergersen / Silhouette of White-tailed eagle (haliaeetus albicilla) sitting on coastal rocks, Kvaloya, Troms, Norway, October.

Hermann Brehm / Montagu's Harrier (Circus pygargus) female landing, Germany.

Wim van den Heever / White tailed eagle (Haliaeetus albicilla) caught in a fight. Hokkaido Japan, March.

Wim van den Heever / White tailed sea eagle (Haliaeetus albicilla) group of three fighting, Hokkaido Japan, March.

Wim van den Heever / White tailed sea eagle (Haliaeetus albicilla) flying looking over shoulder, Hokkaido Japan.

Juan Carlos Munoz / Bateleur eagle (Terathopius ecaudatus) head portrait, Captive, occurs in Africa.

Markus Varesvuo / Golden eagle (Aquila chrysaetos) plucking Capercaillie (Tetrao urogallus) Kuusamo, Finland, April.

Ben Hall / Steppe eagle (Aquila nipalensis) in flight against autumn colours, Czech Republic, November. Captive.

Ben Hall / White-tailed eagle (Haliaeetus albicilla) in flight over mountain landscape at dusk, Iceland, January.

Wim van den Heever / White tailed sea eagle (Haliaeetus albicilla) in flight, Hokkaido, Japan, March.

Wim van den Heever / Steller's sea-eagle (Haliaeetus pelagicus) two fighting over fish watched by White tailed sea eagle (Haliaeetus albicilla) Hokkaido, Japan, February.

Wim van den Heever / Steller's sea-eagle (Haliaeetus pelagicus) in flight, Hokkaido, Japan, February.

Wim van den Heever / White tailed sea eagle (Haliaeetus albicilla) feeding on fish on pack ice, Hokkaido, Japan, February.