You walk outside and notice strange, winding trails through your lawn. The grass looks flattened or chewed, and there are small holes scattered throughout the yard. If that sounds familiar, you may have voles. Vole hole and tunnels in lawn In this video, ProGrass Chief Horticulturist Steve Varga shows you the telltale signs of vole activity. What Are Voles? Voles are small rodents that are often mistaken for mice. Instead of invading your home, they spend most of their lives