Voles are also known as meadow mice, field mice and ground moles. They are not a mole, nor a mouse, nor a shrew. I don’t think I have ever seen a shrew, so I looked it up. Shrews use the tunnels ...
Shrews don’t intentionally eat away at roots and bulbs; the holes and tunnels they dig are minimal ... You might have moles or voles if you have tunnels in your yard and don’t see signs ...