The subfamily Dynastinae is a group of beetles commonly referred to as “Rhinoceros Beetles”. Rhinoceros Beetles are so named because of the graceful horns that most members of this family bear. Some Rhinoceros Beetles reach gigantic proportions and have horns several centimeters in length. Some of these giant species have been given common names of their own, to separate them from the more “mundane” of their horned cousins. The Big 3 are: the Hercules Beetles (Dynastes), the Atlas Beetles (Chalcosoma) and the Elephant Beetles (Megasoma). All three of these genera are known for their larger species, which all grow giant horns. It is interesting to note that only male Rhinoceros Beetles posses these fearsome weapons, which they use to battle other males. In Southeast Asia, boys catch male Rhinoceros Beetles and force them to fight each other. In other parts of the world, they are farmed for sale in the insect trade. There are a small number of breeders in the U.S.A. and Europe who are perfecting the techniques of Rhinoceros Beetle husbandry. In case you were interested in trying your hand at it, understand that Rhinoceros Beetles are not always easy to rear. Many of the giant species have long lifecycles, remaining as larvae for several years (they grow into very big grubs). Depending on the species, some Dynastinae larvae feed exclusively on rotten wood, while others require supplements of protein (denied proper nutrition, larvae turn cannibalistic). The adults prefer to feed on nectar, sap and soft, sweet fruits.