Answer: My first guess would be that the culprit is a skunk. Skunks are nocturnal and will dig holes in search of insects and grubs. The holes are often small enough that they do not cause serious damage to the lawn or plantings so there is usually no need to control them. You may want to examine your lawn for signs of a grub infestation. By controlling the grub population, you'll discourage skunks from digging in your yard. You could also have a professional animal control specialist trap and remove the culprit. Otherwise, you can consider the skunk's work as free pest control and lawn aeration, and simply rake the holes closed once a week. The holes could also be the result of a squirrel burying food for later, or digging up previously hidden food. Woodchucks make large burrows rather than small holes. Rabbits may lie on the lawn to cool off in the summertime but they typically do not burrow.
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