I am working hard to make my garden wildlife friendly, especially to bees, since they are in such trouble. Until recently, I did not realize that bees nest in the ground. Just a few days ago, I noticed some odd activity near my front sidewalk. Several small insects were buzzing around, up and down, very active. I went to look, and found a hole in the middle of a Cheddar Pink dianthus, and dozens of these black and yellow striped insects flying about, going in and out. I thought perhaps they were ground bees. Today, the woman who helps me weed found three more such holes, each about 5-6 inches in diameter, all within 15 feet of each other, all with lots of activity. What are these? Are they dangerous? Should I remove them -- and if so, how? Finally, why now? When I read about ground bees, I read that nesting takes place in spring. But it's mid-August. What is going on? Jo Ellen Roe