Carpenter Ant Killer

When I get the chance, either by mowing the lawn, or just strolling around the house, I look for signs of Carpenter Ant Activity. The nest I found in neighbor's yard, crossing over a couple trees to my porch is inactive now, but nature abhors a vacuum. Carpenter Ants nested there because it was a good spot, and soon another colony will be moving in.

Well during my house walk around's, I've found stray ants, yes Carpenter Ants. I don't know what they are doing, it looks like they are just walking around, and when I follow them, they don't seem to want to head anywhere.

I'm still looking, I can't imagine these ants were just flying by and landed on my house, so I'm sure there is a nest near by.