Their chameleon-like ability to blend into their surroundings makes skulks difficult to detect, so their ever-present populations around the periphery of large settlements are nearly impossible to dislodge permanently. They typically travel in small groups of no more than 16 individuals, since groups larger than that tend to break into violence directed at one other. While skulks see themselves as sharing a common history of being cast out and hated, this is not a strong enough bond to hold large groups of the creatures together with a shared purpose for very long.