Hello Gardeners, I’m Amanda McNulty with Clemson Extension and Making It Grow . The small ground nesting bees fall into several categories – mining bees, orchard bees, or digger bees are among them, and all are important pollinators. They are absolutely no threat to humans or pets – even though several hundred may construct their burrows in the same area, that’s because the ground conditions are perfect. Actually, you could consider them a blessing as they do aerate the soil when they dig out