Aphid

This is a creature that appears in the world of Thieves Web! They're a kind of unevolved, which are basically unevolved feral realistic versions of bugs. They're basically livestock and pets.

Aphids have very few braincells, they run around screaming and running into walls and come in many different colors. Their main ability is creating small clones of themselves that slowly grow up to new Aphids. They have a habit of multiplying like crazy when not under supervision, however there are elixirs that can slow or cease their cloning to keep them reasonable as pets.

These Aphids are all over the darn place and are very common.