Mon Nov 16, 7:45 AM ET

In this photo taken Nov. 2, 2009, Millikin University biology professor David Horn and Stacey Shonkwiler, a 2008 Millikin graduate and the school's ornithological research lab manager, observe the feeding habits of birds at Rock Spring Nature Center in Decatur, Ill. Horn and Shonkwiler operate the National Bird Feeding Society, a group dedicated to providing the best scientific information on the popular hobby. (AP Photo/Herald & Review, Kelly J. Huff)

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