Territorial Mole Tunnels

Each mole has it's own burrow system.

 Picture from Green Heritage News

These tunnels are about five centimeters wide and can be over seventy meters long.  The vary in depth from just beneath the surface of the ground, to seventy centimeters deep.  While the territories of several moles overlap, the moles themselves will not enter another mole's tunnel and will avoid each other if they can.