With the crash of antlers and horns, male antlered flies wage fierce battles for the right to mate with females of choice. As with larger members of the animal kingdom, Darwinian theories of sexual selection are clearly demonstrated among these tiny creatures no larger than a thumbnail. Male flies have evolved eleborate branching antlers and unwieldy horns to attract the attention of potential mates. The more impressive the headgear, the better the chance a male has to breed. Dr. Mark W. Moffett gets eye-level with these flies to record their battles, the winners and losers.