Have you ever seen a bee or bumblebee digging in the ground and wondered what they were doing? Many species of bees spend a good chunk of their lives underground. Several species of solitary bees, including sweat bees, cellophane bees, digger bees, and miner bees, nest in the ground. Each female constructs her own nest site herself by digging a tunnel in the soil. As the weather starts to get cooler, you might observe large bumble bees crawling on the ground or digging in the soil. These are queen bumble bees, looking for a place to spend the winter.