Japanese Rhinoceros Beetle

Allomyrina dichotoma — the Japanese rhinoceros beetle, called kabutomushi (兜虫, 'samurai-helmet bug') — is one of the most culturally significant insects in East Asia and one of about 300 species in the rhinoceros beetle subfamily Dynastinae. Males carry a long forked horn projecting from the head and a shorter prothoracic horn; the two function as a clamp used in male-male competition over feeding sites and mates. Combat is ritualized: males face off on a tree branch, lock horns, and the winner uses the forked horn as a crowbar to pry his opponent off the branch and into the air. The species' famed strength claim — lifting 850 times body weight — comes from a 1933 Japanese laboratory study and has held up under modern verification (though biomechanists note scaling laws preclude similar feats at large body sizes). In Japan, kabutomushi has been kept as a pet for hundreds of years; the species is widely sold as larvae and adults in summer at department stores, and 'beetle wrestling' tournaments are a long-standing children's pastime. The closely related Heracross Pokémon character is based on a rhinoceros beetle. Larvae develop in rotting wood and leaf compost over a year; adults emerge in early summer, mate, and die before autumn.