ORG XMIT: WX103 This photo provided by the University of Florida, taken April 19, 2009, shows a mockingbird grazing University of Florida biology major Devon Duffy, in Gainesville, Fla., in an attempt to drive her away from its nest on the university campus. Mockingbirds may look pretty much alike to people, but they can tell us apart and are quick to react to folks they don't like. Birds rapidly learned to identify people who had previously threatened their nests and sounded alarms and even attacked those folks, even while ignoring others nearby, researchers report in Tuesday's edition of Proceedings of the National Academy of Sciences. (AP Photo/University of Florida, Lou Guillette)
Section:Photo
