Predators closely watch those tunnels. While working by the kitchen sink one morning I was witness to a large red-tailed hawk that swooped down and snatched a mouse from underneath the snow. The hawk soared upward with the tiny mouse squirming in its claws. A total National Geographic moment. It happened so fast I could hardly believe it!
To deter mice from making nests around the perimeter of our house we removed all of our evergreen plants. In the fall, we also trim any dead plant foliage down to about an inch or two away from the ground and compost all the remains. This really helps, and it seems to keep the bunny nests away, too.
Inside the house is another story. Ever since our cat of 17 years (Small Fry) passed on we can't help but feel at a disadvantage when it comes to mice. 'The Fry' was our vigilant sentry who would alert us immediately if she sensed any mouse activity. No mice so far; fingers crossed.
Mouse tunnel photo was taken in our yard last week