Voles are known to follow moles so you'd better look for tunneling on your property.  I trapped 8 voles earlier this year when they followed the moles into my yard.  I was trapping moles when they dug underneath the fence and started digging into the mole tunnels around the house.  I used some victor and tomcat rat traps baited with peanut butter to get them.  The moles took a bit longer to get using victor out o sight and trapline mole traps but as of this moment all are gone having been returned to the dust of the fields.  And since I have dominion over the animals I will do the same for them next time around.  I figure that when the other moles in the area discover the abandoned tunnels that they'll expand out and use them.  I want to capture the little pests before they can breed again next year.