Zebras have figured out how not to stand-out???

Despite the fact that Zebras have these stripes that make them stand out virtually anywhere (except maybe standing against black and white striped wallpaper) they actually use the stripes to their advantage. It's called a "defence posture", they cluster together and create a kind of optical illusion with their stripes in order to confuse predators. I couldn't see how they could "disappear" as a group, only on an individual basis. It's like that saying, Q: How fast can you run? Answer: I only need to run faster than the slowest person.

Here are some more pictures of a lioness stalking a zebra and missing out on the kill. As you can from the blurry photo both animals were moving very fast.