The Formica francoeuri I found last week is apparently calustral, one of them I placed in a THA Mini-Hearth with loose sand which she took and packed into the entrance of her nest. I've got a few others in Taluses that will occasionally run around outside the nest, drink honey, flip me off, etc. With that, should I plug them up inside the nest? Would they be happier being sealed up or having the option to visit the outworld?
What I may do tonight is put loose sand inside to give them the option. If they start sealing up the hole I'll just give them a hand and plug it up.