Trails or burrows
Tunnels and burrows under melted snow are caused by small, mouse-like animals called voles. Voles are most active in lawns near unmown pastures or wooded areas, or where dense vegetation provides shelter for them, like plants around foundations. Voles feed on grass and use tunnels to move about under the snow.
Populations of voles are cyclical, so they may come again for a couple of years and then disappear for a number of years. If they are causing extensive damage to trees, shrubs and lawns, use baited mousetraps to reduce their population.
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Updated Friday, April 19, 2013