I am hopng someone can help me. On saturday I cut down some box elder trees along our back lot line. Yesterday (tuesday) my wife noticed alot of black hornets crawling all over one of the stumps. It appears they are attracted to some kind of sap that is oozing out of the stump. Today I've learned they are bald-faced hornets. My question is how can I keep them away from the stump? My biggest concern is letting my three small children play in the back yard. Tonight at dusk I looked for a nest in my other trees but cannot see one. What can we do? Any help is appreciated.