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Weird dirt spots in my yard #929964

Asked April 28, 2026, 8:47 PM EDT

Could you help identify these dirt spots/holes? I thought my spouse went crazy with the dandelion digger but that wasn't it. Haven't seen them before and we've lived her for decades

Larimer County Colorado

Expert Response

Hello,

These are likely from nightcrawlers. As they clean their underground tunnels, they push out waste and form these mounds on top of the turf or soil. There isn't much you can do to prevent this, nor prevent the nightcrawler activity in your landscape.
Alison O'Connor, PhD Replied April 29, 2026, 12:55 PM EDT

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