The rest of the year is spent in deep tunnels 6 to 24 inches under the surface. Main runways may be used for years. Well-drained, loamy soils are their favorite haunts. Moles are built for digging. They can dig surface runs at one foot per minute.
Moles hear well, though they have no external ears.
Gassing is only occasionally effective. The article was prepared by Jim Pease, Dept. of Animal Ecology and Donald Lewis, Dept. of Entomology, Iowa State University.