Thanks for your question.

I suspect that these holes are either due to the activity of skunks/raccoons or to night crawlers. Possibly, both may be involved. There is nothing for you to do now. Wait until mid-May to see if there is a recurrence of these holes. If so, please get back to us and we can revisit the issue.

Your turf is NOT damaged by these holes. As thing green up in May, these holes should slowly grow over. If night crawlers are involved, there really is no way to prevent them from continually doing this. If skunk or raccoons are involved, they were probably looking for grubs in the turf. If this is the case and you see further evidence of this in May, it may be useful to treat your yard for the elimination of grubs.

For the time being, look at the following for further information on these and related points:

https://extension.umn.edu/yard-and-garden-insects/nightcrawlers - :~:text=They deposit castings at their,when nightcrawlers are first active.

https://www.twincities.com/2017/01/11/column-small-holes-in-your-lawn-nightcrawlers-may-be-to-blame/

https://extension.umn.edu/yard-and-garden-news/whats-digging-your-yard

https://www.minnesotawildanimalmanagement.com/springtime-damage-to-lawns-by-skunks/

https://www.minnesotawildanimalmanagement.com/skunk-control-minnesota/

Thanks for consulting us. Please get back to us with any further questions.