Rhinoceros beetles are a type of large, herbivorous beetle that can be found in tropical and subtropical regions around the world. They are known for their distinctive horn-like protrusions, which males use to fight each other for the attention of females. Rhinoceros beetles are typically black or dark brown in color and can range in size from just a few centimeters to over 15 centimeters in length. Despite their intimidating appearance, these beetles are generally harmless to humans and play an important role in their ecosystems as decomposers and pollinators.