So there is less dung lying around for flies to breed in. It seems to have worked in Canberra, according to John Feehan. He is now a private Dung Beetle Consultant. In Canberra, after just one species of dung beetle had been introduced, the residents reported a dramatic reduction in bush fly numbers. In fact, Canberra residents can now eat outdoors in summer, without being bothered by the pestilent terror of the bush fly.
Dung beetles improve the soil as well.
When they dig the dung into the soil, they make holes in the soil. This means that water can run deep into the soil, and not sit around near the surface. Well, if you had dung beetles in the area, it would take five times as much rain to water-log, or soak, that soil.