I've noticed a pattern with my camponotus sp. ants. They often reserve one room of their nest just for "trash" it's mostly half eaten crickets and fruit flies and it's not clear if they are still working on eating them or not.
I've also noticed that ... from time to time they will clean out the room. Dump all the trash. Mostly after I feed them a bunch of fresh killed bugs. Almost as if they are feeling like they have enough in their gasters that picking over the trash isn't worth it. Has anyone else noticed this? I've seen it with my penns and with my discolor colony.