Heres an update. I searched all around the cattails for a possible nest hole. None to be found. I think the suckers are nesting in the middle of the cattails. I bought two Rescue brand traps from Lowes. One cost 10 dollars one cost 4 dollars. Last night I placed the 10 dollar trap. The dog pulled it down and chewed it up today. Stupid dog. I know that at least the traps "attract" yellow jackets. The tree I placed it in was swarming with them. I hope one stung my stupid dog. Grrr. Right now im waiting for dark to put out the other trap. Can i spray liquid seven directly on the cattails to kill the yellow jackts? Will that work if i cant find the entrance to the nest?