I've seen two here. Wage war, wage war. It does eventually pay off. Our worst year we trapped NINE gallons of the things because we didn't wage war persistantly enough the first few years they were here. Last year only about half that many and I am hoping this year will be better yet. Last year I made my own traps out of milk cartons, enlarging the top opening just enough to get the bait down into the carton and leaving the handle to hang it by. It worked quite well. All I had to buy was the bait.