Igor, a Southern ground hornbill, looks in a mirror while holding a dead mouse in his enclosure at The Knoxville Zoo March 15, 2012. The mirror was placed on the enclosure to see how the animal would respond to seeing its reflection. (ADAM BRIMER/NEWS SENTINEL)
Knoxville Zoo animals react to seeing their reflection in mirrors. The mirrors had an iPhone 4 and a GoPro Hero 2 camera mounted to the back of them to capture the reactions. Photos in this gallery were made with the iPhone 4, iPhone 3Gs, GoPro Hero 2 and Nikon D3s.