Bryant RedHawk has mentioned termites and Hugels. If I remember right, as I was about to try my first one, that there are about 30 varieties of termites and you're bound to get one type in there. Space it farther than 30' from the house,
fence or other freestanding wood things and you
should be okay, if I remember right...!
Just put your hugel far from your house. He also (as bad memory of mine would dredge up) said that birds may go after them so they will clean up hugel based colonies for you.
We had another First Nations poster around when I tried my first one, Navaho Nation member I believe, and I can't remember their name (I have lapped the night and unfortunately am under the influence of doctor prescribed substances for health symptom management-my totally last resort, btw) and can't find the references. For this I offer major apology.