Well to my surprise, 30 or so were wandering around on the bathroom tile a couple days ago. I could not tell where they were coming from, but this was the last straw. I went to the store and got some Raid ant hotels. I tracked them down to a small hole in the corner between the tub and the tile wall. The hole is just small enough for them to come in and out single file. I could have sprayed and sealed the hole, but what would be the fun in that? I wanted them to feast on the ant bait so I put 2 hotels right there in the corner.
You already know I do not subscribe to global warming hype, but we have lived in this house for over 20 years and never had ants in the house of any kind. A couple times last summer, I did notice the same type (I assume) of ant in the driveway coming up through the cracks. 2 or 3 times in the early morning, they would come out of their nests and swarm together in softball sized ant balls. At that time I went and got some fancy type of granular pesticide recommended by the guy at the co-op. It would get rid of them for a few days, and they would just move to another crack.
I wonder if they are some type of mutant super ant? Maybe someone that has had success ridding their house or yard of this super-ant could post a comment!