Oriol Alamany / Birdwatcher, Eulalia Vicens, watching Least auklets (Aethia pusilla) some on rocks, others flying, in the mist, Saint George Island, Pribilof Islands, Alaska, USA

Graham Eaton / Arctic Tern (Sterna paradisaea) in flight, Alaska, USA, June

Steven Kazlowski / Beluga whale (Delphinapterus leucas) swimming in an open lead during spring migration, Chukchi Sea, Barrow, Arctic Alaska

Suzi Eszterhas / Swarm of Moon Jellyfish (Aurelia aurita) Katmai National Park, Alaska, USA

Steven Kazlowski / Arctic fox (Vulpes / Alopex lagopus) scavenging on a Bowhead whale (Balaena mysticetus) carcass 1002 area of the Arctic National Wildlife Refuge, Arctic coast, Alaska, October 2008

Steven Kazlowski / Arctic fox (Vulpes / Alopex lagopus) feeding on a Bowhead whale (Balaena mysticetus) carcass, coat turning from summer phase of grey to winter phase of white, 1002 area of the Arctic National Wildlife...

Steven Kazlowski / Two Arctic foxwa (Vulpes / Alopex lagopus) play on pack ice off the Arctic coast, 1002 area of the Arctic National Wildlife Refuge, Alaska, October 2008

Steven Kazlowski / Pair of Arctic foxes (Vulpes / Alopex lagopus) one adult in its winter coat and one pup in its summer coat, play vigorously on the pack ice, 1002 area of the Arctic National Wildlife Refuge, Alaska, O...

Suzi Eszterhas / Alaskan / Kodiak brown bear {Ursus arctos middendorffi} drinking at sunset, Katmai National Park, Alaska, USA

DOC WHITE / Brown bear {Ursus arctos} swimming, Alaska, USA

Andy Rouse / Grizzly bear (Ursus arctos horribilis) on alert watching more dominant bear, Alaska (non-ex)

David Welling / Arctic lupine flower (Lupinus arcticus) Hatcher Bay, Alaska

Tom Vezo / Nootka lupin leaf with dew {Lupinus nootkatensis} St Paul Is, Alaska

David Welling / Bunchberry flowers {Cornus canadensis} Alaska, USA

Oriol Alamany / Alaska poppies (Papaver alaskanum) in flower, Saint Paul Island, Pribilof Islands, Alaska, USA

Gerrit Vyn / Adult female Red-breasted Merganser (Mergus serrator). Seward Peninsula, Alaska, USA June.

Gerrit Vyn / Male Greater Scaup (Aythya marila) on a tundra pond. Seward Peninsula, Alaska, USA, June.

Gerrit Vyn / Red-necked Grebe (Podiceps grisegena) in breeding plumage performing ^whinny-braying^ duet in defense of territory. Seward Peninsula, Alaska, USA, June.

Gerrit Vyn / Adult male Common Eider (Somateria mollissima) of the Pacific subspecies S. m. v-nigrum. Seward Peninsula, Alaska, USA, June.

Suzi Eszterhas / Harbour / Common Seal (Phoca vitulina) head portrait, resting on seaweed covered rock, Katmai National Park, Alaska, USA

Mark Carwardine / Common / Harbour seal (Phoca vitulina) resting on ice floe, Tracy Arm, South East Alaska, USA

Suzi Eszterhas / Two Harbour / Common Seals (Phoca vitulina) swimming in coastal waters, Katmai National Park, Alaska, USA

Suzi Eszterhas / Harbour / Common Seal (Phoca vitulina) resting on seaweed covered rock, Katmai National Park, Alaska, USA

Lynn M Stone / Sea otter floating in water holding young {Enhydra lutris} Alaska, USA

Steven Kazlowski / Midnight sunset, over the Chukchi Sea near the coastal arctic village of Barrow, Alaska. April 2009

Steven Kazlowski / Polar bear (Ursus maritimus) subadult rolls around in the snow, 1002 area of the Arctic National Wildlife Refuge, Arctic coast, Beaufort Sea, Alaska, October 2008

Steven Kazlowski / Polar bear (Ursus maritimus) sow plays with her spring cub outside their den in late winter, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) sow and cub walking on multi-layer ice (freshwater pans formed over the years where the salt is squeezed out of the ice) on the Chukchi Sea, off the National Petroleum Res...

Steven Kazlowski / polar bear, Ursus maritimus, sow with newborn spring cubs newly emerged from their den, mouth of Canning River along the Arctic coast, eastern Arctic National Wildlife Refuge, Alaska

Mary McDonald / Collared Pika {Ochotona collaris} Denali NP, Alaska, USA

Nigel Bean / Mature bull Muskoxen {Ovibos moschatus} near Teller, Seward Peninsula, Alaska, USA

Mary McDonald / American beaver {Castor canadensis} swimming across lake, Denali NP, Alaska, USA

Konstantin Mikhailov / Snowshoe Hare (Lepus americanus) portrait in autumn coat, Denali NP, Alaska, North America. September

Gerrit Vyn / Adult Bristle-thighed Curlew (Numenius tahitiensis) wing stretching on its Alaskan breeding grounds. Seward Peninsula, Alaska, USA, June.

Steven Kazlowski / Thousands of Snow geese (Chen caerulescens) taking flight to begin their migration south from their summer nesting grounds in the Arctic, Alaska.

Philippe Clement / Sandhill cranes {Grus canadensis} flying in formation during migration over Denali NP, Alaska, USA.

Gerrit Vyn / Adult male Gyrfalcon (Falco rusticolus) perched on rocks. This bird is intermediate between a typical gray-morph and a white morph. Seward Peninsula, Alaska, USA, May.

Eric Baccega / Grizzly bear (Ursus arctos horribilis) mother with three cubs (18 months) fishing on Brooks falls, Brooks river, Katmai National Park, Alaska, USA, July

Suzi Eszterhas / Kodiak / Alaskan brown bear (Ursus arctos middendorffi) two males standing sparring. Katmai National Park, Alaska, USA

Neil Lucas / Brown bear {Ursus arctos} walking with mountains and snow in background. Halo Bay, Alaska.

Hugh Pearson / Aerial view of the Mendenhall Glacier, near Juneau, South East Alaska, August 2007

Steven Kazlowski / Polar bear (Ursus maritimus) footprints in the snow along a barrier island during autumn freeze up, Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, Alaska. October 2009

Oriol Alamany / Nootka lupines (Lupinus nootkatensis) in flower near a wooden house, Saint George Island, Pribilof Islands, Alaska, USA

Steven Kazlowski / Juvenile Snowy owl (Bubo scandiaca) on a beach along the Arctic coast, 1002 area of the Arctic National Wildlife Refuge, Alaska, Autumn

Gerrit Vyn / Adult male Willow Ptarmigan (Lagopus lagopus) in breeding or courtship plumage, perched on a branch, Seward Peninsula, Alaska, USA, May.

Staffan Widstrand / Robert Mulluk Sr, portrait, 73 years old, Kobuk Valley NP, Alaska, USA

Steven Kazlowski / Inupiaq / Inuit man hold his hand under the midnight sun in the Chukchi Sea, off shore from the arctic village of Barrow, Alaska, USA. April 2009