We have never had them before, only black sweet-eating, These are tiny brown ones like you see outside all the time. They come out of the woodwork at night and march all over the counter by the sink. I have put ant cups all over the place but they ignore them! They walk around them and head for everything else, under the coffee pot the can opener, and so on. They were after the container of powdered coffee creamer but we keep that in the fridge now. We do not leave food around. Why aren't they attracted to the ant poison? They are driving us crazy!