Juergen Freund / Little red flying-foxes (Pteropus scapulatus) in flight, Wild River, Heberton, Australia.
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Juergen Freund / Little red flying-fox (Pteropus scapulatus) in flight, Wild River, Heberton, Australia.
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Thomas Lazar / Common loon (Gavia immer) 'Wing Flap' display as part of preening behaviour, High Lake, Northern Highland State Forest, Wisconsin, June.
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Thomas Lazar / Common loon (Gavia immer) on water stretching wings, Turtle Flambeau Scenic Waters Area, Wisconsin, June.
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Roland Seitre / Spanish Imperial Eagle (Aquila adalberti) chick stretching wings at nest, near Jaen, Andujar, Sierra Morena, Spain.
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Roland Seitre / Spanish Imperial Eagle (Aquila adalberti) chick stretching wings at nest, near Jaen, Andujar, Sierra Morena, Spain.
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Roland Seitre / Andean condors (Vultur gryphus) perched on rock, with one flapping wings, with mountainous habitat in the background, Chivay, Arequipa , Peru.
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Roland Seitre / Andean condor (Vultur gryphus) in flight, Chivay, Arequipa , Peru.
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Roland Seitre / Andean condor (Vultur gryphus) in flight, Chivay, Arequipa , Peru.
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Rolf Nussbaumer / Ruby-throated hummingbird (Archilochus colubris) male landing on Virginia creeper (Parthenocissus quinquefolia). Hill Country, Texas, USA.