Doug Wechsler, director of the Visual Resources for Ornithology, shows a Marvellous Spatuletail hummingbird, in the collection at the Academy of Natural Sciences Friday, March 23, 2012 in ... more 
Doug Wechsler, director of the Visual Resources for Ornithology, shows a Marvellous Spatuletail hummingbird, 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) less 
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Associated Press | Photo By Alex Brandon
Sat, Mar 24, 2012 6:22 PM EDT