How long does it take for a June bug to die?

Even though their life cycle typically takes three years, June bugs live for less than one year as adults. They emerge in May and June to lay their eggs, and they die at the end of summer. They can die even sooner if they are affected by the waved light fly. This fly is a natural predator of the adult June bug.

Why do June bugs randomly die?

Because the bug can’t get nutrients or protect itself from predators or the elements when it’s immobilized in this position, it soon dies if it can’t flip back over.