Pete Oxford / Steller's sealions diving into sea {Eumetopias jubata} Commander Is, Russia

Sergey Gorshkov / Polar bear (Ursus maritimus) walking along beach, Wrangel Island, Far Eastern Russia, September.

Igor Shpilenok,Igor Shpilenok / Wolverine (Gulo gulo) portrait. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok,Igor Shpilenok / Large male Reindeer (Rangifer tarandus) standing in shallow waters of the Kronotsky lagoon, away from biting insects. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, July.

Igor Shpilenok,Igor Shpilenok / Portrait of male Reindeer (Rangifer tarandus) with large antlers, in velvet. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, June.

Igor Shpilenok,Igor Shpilenok / Red Fox (Vulpes vulpes) jumping across stream. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Igor Shpilenok / Red Fox (Vulpes vulpes) portrait, resting on snow. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Igor Shpilenok,Igor Shpilenok / Red Fox (Vulpes vulpes) and snow bank reflected in river. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok / Red Fox (Vulpes vulpes) sitting on snow. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok,Igor Shpilenok / Red Foxes (Vulpes vulpes) fighting outside ranger cabin window. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok / European Bison (Bison bonasus) calf and mother portrait. 'Mefody', first calf born to reintroduced herd in Bryansk Forest. Bryansk Forest Zapovednik, Kamchatka, Russian Far East, May.

Igor Shpilenok,Igor Shpilenok / Kamchatka Brown Bear (Ursus arctos beringianus) on the Pacific coast of Kamchatka. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, July.

Igor Shpilenok,Igor Shpilenok / A Kamchatka Brown Bear (Ursus arctos beringianus) standing in breaking waves. Pacific coast of Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, July.

Igor Shpilenok,Igor Shpilenok / Kamchatka Brown Bear (Ursus arctos beringianus) recently risen from hibernation in the caldera of the Uzon Volcano. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, April.

Igor Shpilenok,Igor Shpilenok / Kamchatka Brown Bear (Ursus arctos beringianus) sitting in heavy snowfall. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, December.

Igor Shpilenok,Igor Shpilenok / Kamchatka Brown Bear (Ursus arctos beringianus) stands on its back legs to more easily determine the source of an unfamiliar sound. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Fa...

Igor Shpilenok,Igor Shpilenok / American Mink (Neovison vison) swimming. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, June.

Igor Shpilenok,Igor Shpilenok / Ranger station in winter with Kamchatka Brown Bear (Ursus arctos beringianus), Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, June. Sequence 3 of 3.

Franco Banfi / Beluga whale (Delphinapterus leucas) swimming under ice, Arctic circle Dive Center, White Sea, Karelia, northern Russia. Captive

Franco Banfi / Scuba diver under ice, surfacing to the hole, viewed from underneath, Arctic circle Dive Center, White Sea, Karelia, northern Russia March 2010. No release available.

Franco Banfi / Scuba diver under ice and ice formation, Arctic circle Dive Center, White Sea, Karelia, northern Russia March 2010. No release available.

Franco Banfi / Beluga whale (Delphinapterus leucas) swimming under ice and exhaling air, with scuba diver in background, Arctic circle Dive Center, White Sea, Karelia, northern Russia, captive

Sven Zacek,Sven Zacek / Mute Swans (Cygnus olor) resting on ice after sunset. Baltic Sea, northern Estonia, March.

Sven Zacek / Ice covered rocks along coast of the Baltic Sea, Northern Estonia.

Sven Zacek,Sven Zacek / Ice sheets before sunrise in Estonia. December 2009.

Sven Zacek,Sven Zacek / Kopu lighthouse - the oldest lighthouse in Estonia, on Hiiumaa island. August 2011.

Franco Banfi / Person well dressed for cold temperatures, Arctic circle Dive Center, White Sea, Karelia, northern Russia. No release available.

Franco Banfi / Scuba diver with special head hood for cold water diving, Arctic circle Dive Center, White Sea, Karelia, Northern Russia, April 2009. No release available.

Bert Willaert / Hunter and his dog waiting for raptors to fly over, Georgia, September 2011. No release available.

Vladimir Medvedev / Whiskered auklet (Aethia pygmaea), Iony Island / Jonas' Island, Sea of Okhotsk, Far East Russia, July

Vladimir Medvedev / Whiskered auklet (Aethia pygmaea) portrait, Iony Island / Jonas' Island, Sea of Okhotsk, Far East Russia, July

Sven Zacek / Frozen bubbles captured in ice on the surface of lake. South Estonia, Europe, January 2008.

Sven Zacek / Snow thawing on forested river bank. Estonia, Europe, February 2011.

Sven Zacek / Northern lights far on the horizon in night landscape. Sarek National Park, Sweden, Europe, September.

Sven Zacek / Lowland bog landscape seen from the air. South Estonia, Europe, October 2010.

Sven Zacek / River meeting the sea on the Baltic coast of Estonia. Europe, May 2011.

Sven Zacek / 'Piusa Caves', man-made sand mines. Southern Estonia, Europe, April.

Sven Zacek / Lagoons and small harbour on the island of Hiiumaa. Estonia, Europe, April 2011.

Sven Zacek / Fish seen through water and the reflections of trees. Jogeva maakond, Estonia, Europe, February.

Sven Zacek / People in a cross-country skiing competition. Tartu, Estonia, Europe, February.

Sven Zacek / Lowland marshes seen from the air. Estonia, Europe, October 2010.

Sven Zacek / Waves washing up a beach under dark clouds. Hiiumaa Island, Estonia, Europe, August 2011.

Sven Zacek / Waves crashing onto beach rock under dark clouds. Hiiumaa Island, Estonia, Europe, August 2011.

Sven Zacek / Heavy rainfall on the calm surface of the Baltic Sea. Hiiumaa Island, Estonia, Europe, August, 2011.

Sven Zacek / Waves washing up a beach on the Baltic coast of Estonia under sunset lit clouds. Europe, August 2011.

Sven Zacek / Road leading into the lowland forests of southern Estonia. Europe, October 2010.

Sven Zacek / Moonlit snow on rocks. Tartu county Estonia, January.

Eric Dragesco / Tien Shan Argali (Ovis ammon karelini). Naryn National Park, Kyrgyzstan, Central Asia, November.