I have a very sandy yard and I have an ever-growing pattern of "sand bumps" throughout my front yard. They vary from 1 to 3 inches high and 6 to 12 inches in diameter. They look like small ant hills but there are no ants or openings on top of the bumps. Originally I thought they might be caused by leaks in my water system from the city but city utilities came out and could not immediately find any issues. Someone suggested gophers or other ground animals but I'm seeing no openings in the bumps. Any thoughts?
El Paso County Colorado
I've enclosed two photos of the yard mounds. I put a soda can in them to provide some idea of scale.
Thank you for the information. I'll look up solutions like your traps.