We live in eastern PA. The area is mostly clay. Ants around our yard have been extra busy in the last two years. They are constantly making ant hills and excavating so much dirt that in one area of our law a 1 x 2 foot area has been totally covered in dirt! These ant are black; not especially large; no wings. Why are these ants doing this and how can I encourage them to do it somewhere else! I've read of baits that you can try, but baits never talk about how long you need to offer it to see results. I just want these ant to stop ruining my lawn and gardens. Thanks!