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Associated Press
In this Friday, March 23, 2012, photo, Doug Wechsler, director of the Visual Resources for Ornithology, shows the tag for a Magnificent Bird of Paradise in the collection at the Academy of Natural Sciences Friday, March 23, 2012 in Philadelphia. The Academy is celebrating its bicentennial by offering the general public some rare behind-the-scenes tours of their some 18 million specimens for what's believed to be the first time in 200 years. (AP Photo/Alex Brandon)

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