Something is excavating sand/mortar from between paving bricks, as seen here. I thought it was ants, but I've placed ant traps and bait and there seems to be no effect. Also, when the mounds are disturbed, no insects are visible.

enter image description here

Here's a close-up view of the large pile at the left.

enter image description here

That's a significant amount of sand/mortar being removed.

If it's not ants, what insect is causing this?

  • Good question, thank you for including photographs. Commented May 13, 2019 at 10:32

1 Answer 1


Sidewalk ants are a thing. They are very tiny. But there are also many species of wasp that do this, and are difficult to spot since they spend time either underground or in flight.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.