rhinoceros beetle

Rhinoceros beetles, belonging to the subfamily Dynastinae, are a diverse group of beetles, some of which are among the largest on Earth. Males are distinguished by impressive horn-like structures used for fighting over mates and feeding sites, though they are not used to inflict injury. These beetles have rounded, convex backs and range in color from black to greenish-gray, with some appearing metallic and others having a velvety texture.1

Species like the Hercules beetle (Dynastes hercules) can exceed 18 cm (7 inches) in length, with horns making up a significant portion. Other notable species include the elephant beetle (Megasoma elephas) and the American rhinoceros beetle (Xyloryctes jamaicensis). While generally harmless and feeding on plant material, their larvae can damage plant roots. Some rhinoceros beetles, like those in the Megasoma genus, have lengthy larval stages, spending three to four years before becoming adults. Deforestation and the exotic insect trade pose threats to their populations.1