No two zebras have the exact same stripes, but they can have similar patterns. The stripes act as a camouflage by making it difficult for their predators, mostly lions and hyenas, to identify one zebra alone when they are running together in a herd. Stripes are also like fingerprints or distinctive traits, they help zebras to identify and recognize one another. They are very social animals, they are usually found grazing together in herds while keeping many eyes out to look for predators. They also protect each other from predators, and will defend a wounded zebra from further attack by circling it to drive off predators. There are three main species of zebras, Plains, Grevy's and Mountain, each of the three have their own general pattern. Both the mountain and plains zebra are closer in looks to horses, whereas the Grevy's is closer in looks to a donkey. Plains zebras are also the most populous of all three species.