Alan Williams / Domestic pigeons (Columba livia) flock in flight over houses, Cheshire, UK, June.
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Chris & Monique Fallows / Pintado petrel (Daption capense) flock in flight, Southern Ocean.
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Paul D Stewart / 'Martha' the last passenger pigeon, (Ectopistes migratorius), who died Cincinnati Zoo, September 1st, 1914. This portrait of her published in March 1915 as the Frontispiece to William Hornaday's 'The...
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Brent Stephenson / Flock of Cape petrels (Daption capense capense) in flight against the sea. Against the sun. South Shetland Islands, Antarctica, January.
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Brent Stephenson / Flock of Cape Petrels (Daption capense capense) in flight, heading away against the sky. South Shetland Islands, Antarctica, December.
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Ernie Janes / Flock of white Fantail pigeons (Columba sp) in flight, UK
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Laurent Geslin / Flock of Feral pigeons (Columba livia) in front of the Eiffel tower at dusk, Paris. France, November .
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Laurent Geslin / Flock of Feral pigeons (Columba livia) feeding on bread in an urban street, in the rain, London, England, UK, October 2008.
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Laurent Geslin / Flock of Feral pigeons (Columba livia) feeding on bread, landing / taking off in a busy urban street, London, England, UK, October 2008.
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Andrew Parkinson / Wood pigeon (Columba palambus) flock takes flight from a field of corn stubble, Derbyshire, UK, January
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Edwin Giesbers / RF -European bison (Bison bonasus) herd resting with Rock pigeon (Columba livia) flock. Zuid-Kennemerland National Park, the Netherlands. Reintroduced species. (This image may be licensed either as ri...
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Staffan Widstrand / Wild Wonders of China / Hill pigeon (Columba rupestris) flock landing, Yushu, Tibetan Plateau, Qinghai, China
