"Click" beetle or "POP" beetle gets it's name from the sound it makes when it rights itself after being flipped over onto it's back. A rather large bug, up to 3 inches in length. This bugger ( about 2 inches long ) I photographed after it slammed into the side of my head while I was out photographing insects.

Image was captured using a Canon 50D fitted with a Canon 100-400mm L lens with a 25mm extension tube.