Turns out a good snow year means bad vole damage:
Voles, also known as field mice, are a little rodent that looks like a short-tailed, tiny-eared mouse. They are quite cute but really destructive. It’s a good thing there are plenty of predators around here, including our killer feline.
The cool thing about the damage is that it illuminates the invisible world beneath the snow layer in what’s called the subnivean zone. That’s fancy-talk for under-snow zone. The snow creates a surprisingly insulating layer over the ground, so many animals stay away during the winter months, living in burrows between the soil and the snow. It’s pretty cool! I’d post some links, but you can google subnivean as well as I can. Get after it!