American rhinoceros beetle

The American rhinoceros beetle, Xyloryctes jamaicensis, is a type of scarab beetle belonging to the subfamily Dynastinae. These beetles are named for the hornlike structures on the males, which are used for fighting over mates or feeding sites, not for inflicting injury. The American rhinoceros beetle is relatively small, measuring just over 25 mm (1 inch) long, with males possessing a single upright horn and females having only a small tubercle.12

These beetles are harmless and feed on plant material. Their larvae can damage plant roots, and adult beetles are often found under rotting bark. Some rhinoceros beetle species, like the Hercules beetle, can grow much larger and have impressive, pincer-like horns. The larvae of some species, such as Megasoma, can spend several years in their larval stage.13