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1" holes in lawn surrounded by healthy grass rings #450497

Asked April 29, 2018, 9:48 PM EDT

We live on the front range. This spring we've noticed about 10 rings of darker-green grass in our yard. Each has a hole in the center about 1" wide. No dirt piles around the holes, no obvious runways or shallow tunnels. 

Are these Voles. or something else?

Boulder County Colorado

Expert Response

Hi & thanks for contacting Boulder County Extension.

We are a bit stumped with this one as well. The hole looks too small for a vole, plus the absence of tunneling makes us think it must be something else.

Can you send us a picture of the whole yard. Perhaps there is something else in the landscape that may give us a clue as to what is going on.

Jane & David

An Ask Extension Expert Replied April 30, 2018, 1:45 PM EDT

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