Here's why they aren't considered omnivores, carnivores, or herbivores:

* Detritivores feed on dead organic matter, like decaying leaves, wood, and animal waste. They play a crucial role in breaking down and recycling nutrients in the environment.

* Omnivores eat both plants and animals.

* Carnivores eat only animals.

* Herbivores eat only plants.

While woodlice might occasionally scavenge on small, dead insects, their primary food source is decaying plant matter.