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Phillip Thornton: Heerman's Gull, Alcatraz
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Phillip Thornton: Empire State, one-legged Feral Pigeon, (Columba livia)
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Phillip Thornton: Empire State Feral Pigeon, (Columba livia)
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Phillip Thornton: Liberty Gull
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Phillip Thornton: Feral pigeons, Piazza San Marco