FILE - This undated file picture provided by Christie’s showing Snowy Owls is from a rare first edition set of John James Audubon’s “The Birds of America,” which sold at auction Friday, Jan. 20, 2012, for $7.9 million. Considered a masterpiece of ornithology art, the four-volume set contains more than 400 engraved hand-colored plates of all the North American species known to Audubon in the early 19th century. The volumes stand 3 1/2-feet high because of Audubon’s desire to depict the birds in their actual size and natural habitat. Photo: Christie's / AP

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