My friend once told me a story of an ant farm of his. For a while they went around digging, eating and digging some more. You know, typical ant stuff. Then they started to die, one after another. Bacteria in the dirt of a closed container – or some such.
Finally there was one ant left. It carried the corpses of the others to a particular chamber they’d all dug previously and stacked them. Then it went back about its business until it too died and got no burial but the trash bin.