Ole Jorgen Liodden / Arctic tern (Sterna paridisea) mobbing, Arctic fox (Alopex lagopus) in Spitsbergen, Svalbard, Norway, July.
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Erlend Haarberg / Arctic fox (Alopex lagopus) cubs looking curiously, Dovrefjell-Sunndalsfjella National Park, Norway, July.
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Erlend Haarberg / Arctic fox (Alopex lagopus) silhouetted against stormy sky, Dovrefjell-Sunndalsfjella National Park, Norway, July.
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Erlend Haarberg / Arctic fox (Alopex lagopus) cubs playing, Dovrefjell-Sunndalsfjella National Park, Norway, July.
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Erlend Haarberg / Arctic fox (Alopex lagopus) cubs sitting, Dovrefjell-Sunndalsfjella National Park, Norway, July.
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Erlend Haarberg / Arctic fox (Alopex lagopus) cub sitting,rear view, Dovrefjell-Sunndalsfjella National Park, Norway, July.
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Erlend Haarberg / Arctic fox (Alopex lagopus) adult barking on rocks, Dovrefjell-Sunndalsfjella National Park, Norway, July.
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Erlend Haarberg / Arctic fox (Alopex lagopus) cubs looking curiously, Dovrefjell-Sunndalsfjella National Park, Norway, July.
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Andy Trowbridge / Arctic fox (Alopex / Vulpes lagopus) stalking / hunting silhouetted against a colourful sky at sunset. Dovrefjell National Park, Norway, September.
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Sergey Gorshkov / Arctic foxes (Vulpes lagopus) playing, silhouetted at sunset, Wrangel Island, Far Eastern Russia. August 2010.
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Sergey Gorshkov / Arctic fox (Vulpes lagopus) in winter fur, licking nose, Wrangel Island, Far Eastern Russia, October.
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Sergey Gorshkov / Arctic fox (Vulpes lagopus) with Snow goose egg in mouth, mid moult from winter to summer fur, Wrangel Island, Far Eastern Russia.