The House of 42 Doors has been empty of humans for almost two years. I think that the total biomass in the house did not decrease though. With no one living there, all number of spiders, wood lice, centipedes, mice and who knows what else have moved in.
My mother came and stayed with us for a week and cleaned the two main floors from top to bottom (bless her soul!) and that got rid of a majority of the smaller vermin, but the mice continue to live in the house. We started trapping almost immediately and to date we're somewhere around 13 or 14 mice. I've lost track.
Imagine my surprise when I went up to check the traps in the attic and found one missing. I told Ms. Huis that I was going to look around the attic for the trap and that if she heard a scream, to grab the kids, run from the house and never return again.
What I found in a back corner of the attic, about 25 feet from where I put it, was this:
I think the mice are evolving.