Hi, I am trying to set up a naturalistic setup for a terrarium for my ant colony. At the moment my colony lives in a small test tube set-up but I feel like they are using all the available space as is so I want to expand it. Attached are photos. I believe they are black carpenter ants (camponotus pennsylvanicus) so I'm going to base questions on that but if I have them misidentified then I'd love to have the questions deal with whatever species they are I was wondering, where or what would carpenter ants live in in a typical outdoor environment? How I could best recreate it in a terrarium set up? Do you have any recommendations? In particular, I was thinking of if they would need some sort of substrate to dig in and what I would use for that?