A few years ago, I was clearing a garden of debris when I was startled by movement. To my surprise, I had disturbed a Prairie Skink (Plestiodon septentrionalis).
Prairie skink prefer sandy soils and open grasslands with loose soil so that they can construct their burrows. Our soil is mess of clay, sand, rocks, and humus and can become quite hard when it dries out. I usually see the skink in or near our gardens. Perhaps my working the soil in the gardens has created enough loose soil to provide a suitable habitat for the skink.