|D.tityus (Eastern US)|
For a video of wild D.hercules, see here: http://www.youtube.com/watch?v=rO8pZr0tq1M
Hercules beetles are fairly well armoured creatures, and do not seem to have a lot of natural predators. The grubs are also well protected inside rotting logs or deep in the litter layer – females in captivity seem to need to dig down at least 30cm to lay their eggs. As a result, they are not especially prolific, with a female laying perhaps 50 eggs in her lifetime.
|D.hercules - final instar larva|
(images from wikipedia)