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 / Steller's sea-eagle (Haliaeetus pelagicus) standing on pack ice, Hokkaido, Japan, February.

Wim van den Heever / Steller's sea-eagle (Haliaeetus pelagicus) landing on pack ice, Hokkaido, Japan, February.

Danny Green / Steller's sea eagle (Haliaeetus pelagicus) on snowy ground, Japan, February

Danny Green / Steller's sea eagle (Haliaeetus pelagicus) close up portrait, Japan, February

Danny Green / Steller's sea eagle (Haliaeetus pelagicus) in flight, Japan, February

Markus Varesvuo / Steller's Eagle (Haliaeteus pelagicus) in flight over snow, Hokkaido, Japan, February

Markus Varesvuo / Steller's Eagle (Haliaeteus pelagicus) flying past snowy mountain peak, Hokkaido, Japan, February

Ben Cranke / Steller's Sea Eagle (Haliaeetus pelagicus) stood on ice floe, Hokkaido, Japan. February.

Ben Cranke / Steller's Sea Eagle (Haliaeetus pelagicus) portrait, Hokkaido, Japan. February.

Ben Cranke / Steller's Sea Eagle (Haliaeetus pelagicus) in flight, Hokkaido, Japan. February.

David Tipling / Steller's sea eagle {Haliaeetus pelagicus} off Rausu, Shiretoko Peninsula, Hokkaido, Japan, February

David Tipling / Steller's sea eagle {Haliaeetus pelagicus} portrait, Nemuro Channel, Hokkaido, Japan, February

David Tipling / Steller's sea eagle {Haliaeetus pelagicus} adult and immature fighting over carcass, Shiretoko Peninsula, Hokkaido, Japan, February

Igor Shpilenok / Steller's sea eagle {haliaeetus pelagicus} flying through heavy snow storm, Kuril Lake, Kamchatka, Far East Russia

Igor Shpilenok / Steller's sea eagle {Haliaeetus pelagicus} flying through snow, Kuril Lake, Kamchatka, Far East Russia

Igor Shpilenok / Steller's sea eagle {Haliaeetus pelagicus} walking over snow, Kuril Lake, Kamchatka, Far East Russia

Igor Shpilenok / Steller's sea eagle {Haliaeetus pelagicus} walking over ice, Kuril Lake, Kamchatka, Far East Russia

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

Igor Shpilenok / Steller's sea eagle {Haliaeetus pelagicus} in flight carrying Sockeye salmon in claws, Kuril Lake, Kamchatka, Far East Russia

Igor Shpilenok / Two Steller's sea eagles {Haliaeetus pelagicus} perched in tree, Kuril Lake, Kamchatka, Far East Russia

Igor Shpilenok / Three Steller's sea eagles {Haliaeetus pelagicus} gathered beside Kuril Lake, Kamchatka, Far East Russia

Igor Shpilenok / Steller's sea eagle {Haliaeetus pelagicus} adult and juvenile squabbling over Sockeye salmon prey, Kuril Lake, Kamchatka, Far East Russia

Igor Shpilenok / Steller's sea eagles {Haliaeetus pelagicus} gather beside Kuril Lake with Ilinsky volcano in the background, Kamchatka, Far East Russia, winter 2007

Igor Shpilenok / Steller's sea eagle {Haliaeetus pelagicus} sunning on tree top, Kuril Lake, Kamchatka, Far East Russia

Igor Shpilenok / Steller's sea eagle {Haliaeetus pelagicus} about to pick up Sockeye salmon prey in its claws, Kuril Lake, Kamchatka, Far East Russia

David Pike / Steller's sea eagles perched in tree {Haliaeetus pelagicus} Nemuro Straits, Japan

Neil Lucas / Steller's sea eagle head portrait

Mario Mueller/ BIA / Steller's Sea Eagle (Haliaeetus pelagicus) flying, Hokkaido, Japan

Thomas Marent / Steller's Sea Eagle (Haliaeetus pelagicus) flying, Rausu, Hokkaido, Japan

Thomas Marent / Steller's Sea Eagle (Haliaeetus pelagicus) group on ice floe, Rausu, Hokkaido, Japan

Robert Pickett / Steller's sea eagle, (Haliaeetus pelagicus), on sea pack ice, Okhotsk Sea, Rausu, Hokkaido, Japan,

Danny Green / Two Steller's sea eagles (Haliaeetus pelagicus), on snowy perch, Japan, February

Guy Edwardes / Steller's sea eagle (Haliaeetus pelagicus) on sea ice, Hokkaido, Japan

Guy Edwardes / Two Steller's sea eagle (Haliaeetus pelagicus), pair fighting in flight above sea ice, Hokkaido, Japan

Markus Varesvuo / Steller's Sea Eagle (Haliaeetus pelagicus) in flight, searching for food, Hokkaido, Japan, February.

Markus Varesvuo / Steller's Sea Eagles (Haliaeetus pelagicus) passing prey in mid-air, Hokkaido, Japan, February.

Markus Varesvuo / Steller's Sea Eagle (Haliaeetus pelagicus) with prey in beak in mid-air, Hokkaido, Japan, February.

Markus Varesvuo / Steller's Sea Eagle (Haliaeetus pelagicus) flying, Hokkaido, Japan, February.

Markus Varesvuo / Steller's sea eagle (Haliaeetus pelagicus) head portrait, Hokkaido Japan February

Markus Varesvuo / Steller's sea eagle (Haliaeetus pelagicus) head portrait, Hokkaido Japan February

Markus Varesvuo / Steller's sea eagle (Haliaeetus pelagicus) head portrait, Hokkaido Japan February

Markus Varesvuo / Steller's sea eagle (Haliaeetus pelagicus) in flight above sea ice, Hokkaido Japan February

Markus Varesvuo / Steller's sea eagle (Haliaeetus pelagicus) in flight above sea ice, Hokkaido Japan February

Markus Varesvuo / Steller's sea eagle (Haliaeetus pelagicus) subadult in flight above sea ice, Hokkaido Japan February

Markus Varesvuo / Steller's sea eagle (Haliaeetus pelagicus) in flight above sea ice, Hokkaido Japan February

Markus Varesvuo / Steller's sea eagle (Haliaeetus pelagicus) running on ice, carrying prey in talons, Hokkaido, Japan, February.