Update 11-12-2023
I found one more of these queens on 8-23-2023 after Tropical Storm Hilary came through. Unfortunately because of that storm, everything flew everywhere on the same day, so I didn't manage to get there until it was too late. This meant if I wanted one, I would need to dig it up, which for reasons I mentioned in one of my previous posts, is not fun at all. So like I said, I only got one, and that queen just ended up dying anyway.
As for the mature colony in the hexagon tank, it seems to be doing great. They have been very active the last few months, taking all the food I give them down into the nest.
It's interesting how they keep the nest entrance as inconspicuous as possible a lot of the time, carrying all the sand and gravel they take out of the nest far away from the entrance. In the wild, it is really hard to spot their nests because of this. Only lately have they been building up a bit more gravel around the entrance.
One thing I noticed they do--and I don't think this is unique to this species--is they will all go back into the nest except for one worker who remains outside just kind of wandering around all night with the nest completely closed up. It's like that worker gets the job of dropping the final piece of gravel over the hole at night, which leaves her stuck outside until the next day. 
Last but not least, the new colony from last season produced so much brood that it now has 25 workers. This is definitely the largest colony of these I have ever raised myself.
