Xylotrupes socrates

The Siamese rhinoceros beetle, fighting beetle, "Xylotrupes socrates" (Thai : ด้วงกวางชน) is a brilliant species of large scarab beetle belonging to the subfamily Dynastinae. It is particularly known for its role in insect fighting in Thailand.
Distribution.
This species is widespread in South-eastern Asia: Bangladesh, Cambodia, China, India, Laos, Myanmar, Nepal, Thailand, and Vietnam.
Description.
Like most Dynastinae, male "socrates" possess two horns; one on the head and another on the pronotum, both bifurcate and curling inward. These beetles have black or dark chestnut brown exoskeletons and elytra.
Beetle fighting.
These beetles are used for staging beetle fights, a traditional entertainment popular in the northern region of Thailand. They are captured and trained by their owners to become stronger and more aggressive.
In the fight the beetle that lifts its opponent up by its horns wins. A bug may also win if his opponent walks away, falls or is overturned.
Insect fighting is mostly practiced in the Chiang Mai and Nan provinces of Thailand. It is also popular in Myanmar and Northern Laos. Spectators usually place bets on the fights.
Insect coaches claim that their activity provides a free pastime while drawing attention upon insects that would otherwise have been ignored or just killed as pests.