Field note. The colony has cleared a vast rectangle of ground, sealed it under a black hydrocarbon crust, and painted parallel white lines across it at regular intervals. Each slot is sized to receive exactly one of their metal transport shells. The shells arrive, roll into a slot, and cease. The organism inside then abandons the shell entirely, walks away, and does not look back.
I have observed this cycle for six of their rotational units. The shells sit in perfect rows, cooling, ticking as their internal exothermic units contract. Hundreds of them. They do nothing. They wait.
Correction to earlier hypothesis. I first classified the rectangle as a burial ground, given the stillness and the reverent spacing. This was incorrect. The organisms return. They emerge from the surrounding structures carrying sealed bags of consumable matter, locate their specific shell among the identical hundreds, and reanimate it. The shell is not dead. It is dormant. The organism has only left it to graze.
Notable anomaly. The organisms cannot reliably relocate their own shell. I have logged multiple specimens walking the rows, pressing a small device that causes one distant shell to emit light and a short cry. The shell calls; the organism answers. They have built machines they must summon like offspring who have wandered.
Further data required regarding the enclosed vessel affixed to a pole, into which departing organisms insert their sacred tokens before the barrier will lift and release them. It appears they must pay the rectangle a tribute for the privilege of having stood still upon it. I have concluded the black crust is not ground they own.
It is a landlord.