Well you can hardly call a Zebra pattern camouflage. One animal documentary suggests that when the Zebras are all bunched together eg, when grazing, the individual Zebra patterns 'merge' together to form a confusing illusion for potential predators. They showed a clip of this and they did indeed produce an illusion, however the camera was positioned very far away, far further than any potential predator would be.
Can anyone suggest another possible reason for a Zebras so-called camouflage?