A 46-year-old bird enthusiast from Zion visited the Nachusa Grasslands a few weeks back with one main goal: catch a glimpse of a rare prairie falcon that had been spotted in the Downstate preserve.Camera, binoculars and spotting scope in tow, Eric Walters ended up with something else: snapshots of a golden eagle hunting seemingly impossible prey -- a grown white-tailed deer."It was really, really exciting to see one," Walters said, referring to the golden eagle. "And to see one hunting, going for a kill -- I've never seen that before. And then to see a golden try to take something out significantly heavier . . . hunting a deer is off the charts." Click on the pic to see the photos.