Male stag beetles are known for their over size mandibles used to wrestle each other for favoured mating sites in a way that parallels the way stags fight over females. Fights may also be over food, such as tree sap and decaying fruits. Despite their often fearsome appearance, they are not normally aggressive to humans. During a battle the main objective is to dislodge its opponents tarsal claws with its mandible, thus disrupting their balance. Due to its mandibles capable of exceeding its own body size it does come with a downside. Affecting its movability of running due to its disproportional body, because of this they normally fly to their destination.