Ole Jorgen Liodden / Arctic skua (Stercorarius parasiticus) in flight, Svalbard, Norway, August.
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Michael Pitts / Gentoo penguins (Pygoscelis papua) calling and defending their eggs from Southern Skua (Stercorarius antarcticus) hunting for unattended eggs or chicks, Sea Lion island, The Falklands, South Atlantic.
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David Tipling / Great Skua (Stercorarius skua) in flight low over water, Fetlar, Shetland, June
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SCOTLAND: The Big Picture / Great Skua (Catharacta skua) with chick, Hermaness, Shetland, Scotland, UK, July.
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Stefan Christmann / South polar skuas (Stercorarius maccormicki) Atka Bay, Queen Maud Land, Antarctica.
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Stefan Christmann / Emperor penguin (Aptenodytes forsteri) with South polar skua (Stercorarius maccormicki) Atka Bay, Queen Maud Land, Antarctica. October.
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Stefan Christmann / South polar skua (Stercorarius maccormicki) resting on ground, Atka Bay, Queen Maud Land, Antarctica. October.
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Markus Varesvuo / Great skua (Stercorarius skua) in courtship display. Shetland, Scotland, UK. July.
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Markus Varesvuo / Great Skua (Stercorarius skua) pair standing in grassland with chick. Shetland, Scotland, UK. July.
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Markus Varesvuo / Great skua (Stercorarius skua) in flight with cliff in background. Shetland, Scotland, UK. July.
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Markus Varesvuo / Great skua (Catharacta skua) in flight, close-up. Shetland, Scotland, UK. July.
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Markus Varesvuo / Great skua (Catharacta skua), two in courtship display. Shetland, Scotland, UK. July.