The tunnelers behavior is slightly more complex. They build tunnels underneath the dung pile. Using these tunnels, the beetles can move dung balls from the pile into the safety of their own tunnel. The most complex behavior is practiced by rollers. The beetle I saw today was a roller.
Dung beetles use several strategies for finding their stinky food.
Some beetles march along after mammals, some fly, and others prefer to wait in strategic spots for the tell-tale odors to reach their sensitive snouts. The female actually goes shopping to pick best dung ball. The bigger the dung ball, the more attractive the mate. Later, she lays her eggs there, snacking on dung the whole time. The two beetles bury the entire dung ball in the soil, as deep as they can, to keep it safe from other insects.