All it takes is a good stretch of the wings to make even a loser cricket feel like putting up his dukes to fight, according to a new study on insect aggression.
When male crickets meet, the encounter is usually not friendly. The insects first fence with their antennae. The fight intensifies as the competitors bare and lock their mandibles and then wrestle until one cricket knuckles under. The contest can end whenever one of the competitors gives up and runs away.