From Creatures Wikia
Meerk (Merkolus humble)meercat and a squirrel, the Meerk is undoubtedly one of the more common-looking residents of the Desert Terrarium. Unfortunately, it is affected by an ill-tested ecology, and is a rare sight above-ground in its terrarium.
Did you know? In the uppermost left of the Norn Terrarium is a dead Meerk that is shown as a picture for deceased norns.