Dave Watts / Wedge-tailed eagle {Aquila audax fleayi} tasmanian sub species, adult portrait, Australia

Jami Tarris / Golden Eagle (Aquila chrysaetos) huntress, Altai Mountains, Bayan Ulgii, Mongolia

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

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

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.

Pal Hermansen / Golden eagle (Aquila crysaetos) on dead Fox (Vulpes vulpes) carcass. Trondelag, Norway. March. Remote camera shot

Winfried Wisniewski / Tawny Eagle (Aquila rapax) flying, KwaZulu-Natal, South Africa

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

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

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.

SCOTLAND: The Big Picture / Golden eagle (Aquila chyrsaetos) female flying into nest site with small branch, Glen Tanar Estate, Cairngorms National Park, Scotland, UK, June.

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.

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.

Staffan Widstrand / Bonelli's eagle or Eurasian hawk-eagle, Hieraetus fasciatus or Aquila fasciata, picture taken from hide, at a feeding station for conservation purposes, utillizing live domestic pigeons caught as pest...

Kristel Richard / Eagle hunter mounted on Mongolian horse with his female Golden eagle (Aquila chrysaetos) at Eagle Hunters Festival, near Sagsai, Bayan-Ulgii Aymag, Mongolia. September 2014..

Ben Cranke / Golden Eagle (Aquila chrysaetos) in flight, Finland. February.

Markus Varesvuo / Golden Eagles (Aquila chrysaetos) mating in snowy forest clearing. Kuusamo, Finland, February

Markus Varesvuo / Golden Eagles (Aquila chrysaetos) mating in snowy forest clearing. Kuusamo, Finland, February

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) flying, Utajrvi, Finland, January

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) flying over snow, Utajrvi, Finland February

Markus Varesvuo / Golden Eagle (Aquila chrysaetos), juvenile standing in the snow. Utajrvi, Finland. February.

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) in flight. Utajrvi, Finland. February

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) in flight. Utajrvi, Finland. February

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) in flight. Utajrvi, Finland. February

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) in flight being harrassed by raven. Utajrvi, Finland. February

Roger Powell / Spanish imperial eagle (Aquila adalberti) perched on a rock and stretching its wings, Castro Verde, Alentejo, Portugal, April.

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) portrait in snow, Utajarvi, Finland February

Stefan Huwiler / Golden Eagle (Aquila chrysaetos), adult defending carcass from Red Fox (Vulpes vulpes), Sinite Kamani National Park, Bulgaria, Europe. February

Stefan Huwiler / Golden Eagle (Aquila chrysaetos) adult defending carcass from Red Fox (Vulpes vulpes), Sinite Kamani National Park, Bulgaria, Europe. February. Commended, Behaviour : Birds category, Wildlife Photogra...

Staffan Widstrand / Golden eagle (Aquila chrysaetos) close up in snow with Red fox (Vulpes vulpes). Photographed at a wildlife watching facility, the fox was shot by local hunters as a standard wildlife management practi...

Markus Varesvuo / Golden eagle (Aquila chrysatus) with wings outstretched in snow, Utajarvi, Finland, January

Roy Mangersnes / Golden eagle (Aquila chrysaetos) perched on a dead pine tree, Southern Norway, December

Roy Mangersnes / Golden eagle (Aquila chrysaetos) perched on dead pine tree, Southern Norway, December

Laurie Campbell / Golden eagle (Aquila chrysaetos) chick, one week, in eyrie showing egg-tooth on tip of bill, Argyll, Scotland, early May

Laurie Campbell / Golden eagle (Aquila chrysaetos) falconer's bird perched in scots pine (controlled) Southern Scotland, February

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) in flight with curled primary feathers against a snowy background. Kuusamo, Finland, February.

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) pouncing in flight with claws brandished. Kuusamo, Finland, February.

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) landing in snow. Kuusamo, Finland, February.

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) flying low over snow with talons brandished. Kuusamo, Finland, February.

Lassi Rautiainen / Golden eagle (Aquila chrysaetos) about to land on snow, Oulanka NP, Finland, February

Alex Hyde / Golden eagle (Aquila chrysaetos) male. Captive, UK.

Alex Hyde / Golden eagle (Aquila chrysaetos) sequence showing protective nictitating membrane over eye. Captive bird, UK.

Juan Carlos Munoz / Close-up of the feathers of a Spanish imperial eagle (Aquila adalberti). Sierra de Andujar Natural Park, Jaen, Andalusia, Spain

Juan Carlos Munoz / Close-up of the talons of a Spanish imperial eagle (Aquila adalberti). Sierra de Andujar Natural Park, Jaen, Andalusia, Spain, Captive

Juan Carlos Munoz / Spanish imperial eagle (Aquila adalberti) stooping to catch a lizard. Sierra de Andujar Natural Park, Jaen, Andalusia, Spain, Captive

Juan Carlos Munoz / Spanish imperial eagle (Aquila adalberti) perching on a rock. Sierra de Andujar Natural Park, Jaen, Andalusia, Spain, Captive

Juan Carlos Munoz / Spanish imperial eagle (Aquila adalberti) in flight. Sierra de Andujar Natural Park, Jaen, Andalusia, Spain, Captive

Kevin Schafer / Ascension frigatebird (Fregata aquila) male soaring high, Ascension island, Atlantic Ocean, Vulnerable species

Kevin Schafer / Ascension frigatebird (Fregata aquila) flock soaring high, Ascension island, Atlantic Ocean, Vulnerable species

John Waters / Golden eagle (Aquila chrysaetos) adult female taking off, flying over mountain landscape, trained bird photographed during filming in Glenveagh National Park, Donegal, Republic of Ireland. August 2010

John Waters / Golden eagle (Aquila chrysaetos) adult female taking off, flying over mountain landscape, trained bird photographed during filming in Glenveagh National Park, Donegal, Republic of Ireland. August 2010

Dietmar Nill / Golden eagle (Aquila chrysaetos) in flight over snow, Alps, Austria, controlled conditions

Juan Carlos Munoz / Spanish imperial eagle (Aquila adalberti) portrait, Spain Captive

Peter Cairns / Golden eagle (Aquila chrysaetos) sub-adult male (two years) in flight over Cairngorms National Park, Scotland, UK, captive

Peter Cairns / Golden eagle (Aquila chrysaetos) sub-adult male (two years) flying down to take prey, Cairngorms National Park, Scotland, UK, captive

Eric Baccega / Head portrait of Golden eagle (Aquila chrysaetos) captive

Peter Cairns / Golden eagle (Aquila chrysaetos) sub-adult female in flight, Cairngorms National Park, Scotland, UK, captive

Wild Wonders of Europe / Shpilenok / Two Steppe eagle (Aquila nipalensis) chicks in their nest. Cherniye Zemli (Black Earth) Nature Reserve, Kalmykia, Russia, May 2009 Wild Wonders kids book.

Chris Gomersall / Golden eagle (Aquila chrysaetos) sub-adult in winter snow shower, captive bird, Speyside, Scotland, February

Angelo Gandolfi / Golden Eagle (Aquila chrysaetos) swooping with folded wings and extended tallons. Canyon del Ebro y Rudron, Castilla y Leon, Spain. Digital composite

Angelo Gandolfi / Golden Eagle (Aquila chrysaetos) swooping. The sequence of folding wings to gain speed. Canyon del Ebro y Rudron, Castilla y Leon, Spain. COMPOSITE IMAGE.

Angelo Gandolfi / Golden Eagle (Aquila chrysaetos) swooping with folded wings and extended tallons. Canyon del Ebro y Rudron, Castilla y Leon, Spain. Digital composite

Angelo Gandolfi / Golden Eagle (Aquila chrysaetos) swooping with folded wings to gain speed. Canyon del Ebro y Rudron, Castilla y Leon, Spain. Digital composite

Angelo Gandolfi / Golden Eagle (Aquila chrysaetos) swooping with folded wings and extended tallons. Canyon del Ebro y Rudron, Castilla y Leon, Spain. Digital composite

Wild Wonders of Europe / Widstrand / Golden eagle (Aquila chrysaetos) taking off, Flatanger, Norway, November 2008

Angelo Gandolfi / Golden Eagle (Aquila chrysaetos) swooping with folded wings and extended tallons. Canyon del Ebro y Rudron, Castilla y Leon, Spain. Digital composite

Angelo Gandolfi / Golden Eagle (Aquila chrysaetos) swooping with wings completely folded. Canyon del Ebro y Rudron, Castilla y Leon, Spain.

Edwin Giesbers / Golden eagle (Aquila chrysaetos) captive

Wild Wonders of Europe / López / Lesser spotted eagle (Aquila pomarina) perched in tree, Latvia, June 2009

Wild Wonders of Europe / Shpilenok / Two Steppe eagle (Aquila nipalensis) chicks, Cherniye Zemli (Black Earth) Nature Reserve, Kalmykia, Russia, May 2009

Wild Wonders of Europe / Shpilenok / Steppe eagle (Aquila nipalensis) on nest with chicks, Cherniye Zemli (Black Earth) Nature Reserve, Kalmykia, Russia, May 2009

Wild Wonders of Europe / Shpilenok / Steppe eagle (Aquila nipalensis) on nest, Cherniye Zemli (Black Earth) Nature Reserve, Kalmykia, Russia, May 2009

Wild Wonders of Europe / Widstrand / Golden eagle (Aquila chrysaetos) in tree with dead bird, wings out stretched, Flatanger, Norway, November 2008

Wild Wonders of Europe / Widstrand / Golden eagle (Aquila chrysaetos) in flight over snow, Flatanger, Norway, November 2008 Wild Wonders kids book.

David Tipling / Eagle hunters with golden eagles (Aquila chrysaetos) on route to the Eagle Hunters festival near Ulgii Western Mongolia, October 2009. Winner of the Indigenous Cultures Award in Nature's Best Competit...

Wild Wonders of Europe / Zacek / Golden eagle (Aquila chrysaetos) portrait, Kitkajoki, Kuusamo, Oulanka National Park, Finland, February 2009

Wild Wonders of Europe / Wothe / Eastern imperial eagle (Aquila heliaca) perched on branch, East Slovakia, Europe, June 2008

Wild Wonders of Europe / Wothe / Imperial Eagle flying to the mountains east of Kosice, Slanske vrchy, Eastern Slovakia, Europe, June 2008

Wild Wonders of Europe / Wothe / Eastern imperial eagle (Aquila heliaca) in flight, East Slovakia, Europe, June 2008

Wild Wonders of Europe / Wothe / Eastern imperial eagle (Aquila heliaca) in flight, East Slovakia, Europe, June 2008

Wild Wonders of Europe / Wothe / Eastern imperial eagle (Aquila heliaca) at nest with young, East Slovakia, Europe, June 2008

Wild Wonders of Europe / Wothe / Two Eastern imperial eagle (Aquila heliaca) chicks in the nest, East Slovakia, Europe, June 2008

Wild Wonders of Europe / Wothe / Eastern imperial eagle (Aquila heliaca) carrying Hare prey in flight, East Slovakia, Europe, June 2008

Igor Shpilenok / Two Steller's sea eagles {Haliaeetus pelagicus} and a Golden eagle {Aquila chrysaetos} Kuril Lake, Kamchatka, Far East Russia

Pete Cairns / Golden eagle (Aquila chrysaetos) landing in woodland clearing,Cairngorms NP, Scotland, UK Captive

Pete Cairns / Golden Eagle (Aquila chrysaetos) flying, captive, Cairngorms NP, Scotland, UK.

Pete Cairns / Golden Eagle (Aquila chrysaetos) adult portrait, captive, Cairngorms NP, Scotland, UK.

Pete Cairns / Golden Eagle (Aquila chrysaetos) adult portrait, captive, Cairngorms NP, Scotland, UK.

Pete Cairns / Golden Eagle (Aquila chrysaetos) adult portrait, close up of eye, captive, Cairngorms NP, Scotland, UK.

Pete Cairns / Golden Eagle (Aquila chrysaetos) close up of eye, captive, Cairngorms NP, Scotland, UK.