Small tunnels in garden
This year, along with record numbers of chipmonks, squirrels and rabbits, I have noticed a lot of tunnels in the garden and the lawn. The dirt bulges up a little bit and it's easily compressed (which I do with my feet whenever I discover them).
What's causing this and should I take action? Moles, voles or something else? I haven't noticed any damage to the plants yet, but I'd like to do something before it's too late.
Should I be concerned or just live and let live?