One of the fun little discoveries of our new apartment was that ants paraded across the hardwood floor in the living room, carrying stray pieces of cat litter and depositing them under the rug. Not sure from where the ants were coming into the building, but they seemed to find the corner of the window to be an adequate escape route. We didn't use bug spray on the ants, choosing instead to be more vigilant about cleaning up the cat litter or smooshing them with our fingers.
I noticed lately that the ants were mostly gone. I also realized that small, nearly invisible spider webs started to collect in the corner of the window and in the bathroom door jamb. Inside the webs are piles of balled-up ant carcasses. A little gross, but also pretty cool to know that the daddy long-legs chilling in the corner is taking care of business. It's always been my policy to not kill spiders unless they're giant and hairy and about to climb on my head (which, thankfully, has yet to happen), but now I'm even more appreciative of these eight-legged predators. Which just goes to show you that letting nature do its thing is far better than creating an artificially sterile home.
Oh yeah, note to self: don't look up info about spiders before going to bed, especially if the web site has photos. Yeesh.