Any small holes in the ground?
Voles did tremendous damage in my gardens a few years ago.
They took down trees and shrubs(by eatting all the roots) and ate all my Lily and tulip bulbs and flowers.
We ordered product here
http://www.volecontrol.com/
and since placing it throughout the gardens, we are again able to have things survive.
(Unfortunately, we found no "peaceful" solutions where voles are concerned.)
We have the Carolina Pine voles here, but there are over 400 species in the US alone.
Before our encounter with these pests I had never heard of voles.
Guess they are vegetarians and use mole tunnels to travel through.
