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Zebras are perisodáctilos or ungulates with an odd number of hooves. They are three species, each with a specific pattern of stripes: the Grevy's zebra, the mountain zebra and zebra common. Zebras are one of the most famous animals of Africa, inhabited by different types of ecosystems including plains of grass, savannahs, areas of forest or bush, mountains and coastal hills. They are especially known for their characteristic black and white stripes, not only between species but also vary from one individual to another, and his mane erect. Unlike their closest relatives, the horses and asses, zebras have never been truly domesticated. Except for some populations of zebra common inhabiting the center of Ethiopia, zebras live only in the southern half of the African continent. Although the areas of distribution of two different species may overlap, the differences in the number of chromosomes that prevent intersect : Grevy's zebras are at 46, 44 and zebras common Mountain zebras.
Although the black and white stripes showing zebras are a common feature of the three zebra species do not have a step closer relationship between them than they have with other animals of the genus Equus. In addition, the common feature of the stripes is not as definitive; a subspecies of the common zebra, the extinct quaga only had stripes on the neck. Moreover, there are other perisodáctilos also have striped legs.
Zebras have a total of forty teeth: twelve incisors used for cutting and grabbed vegetation; four canines ; twelve premolars and twelve molars, all used to grind food before you swallow. Zebras have an excellent sense of sight ; it is believed that they can see in color. How many ungulates, zebras have eyes on the sides of the head, which provides a fairly wide visual angle. The Zebras also have night vision, although not as advanced as that of most predators, but its good ear for it. Zebras have a great sense of hearing, and tend to have large, rounded ears than horses. Like horses and other ungulates, zebra can turn their ears in almost any direction. Besides a good sight and hearing, zebras have a sense of taste sharp, and a sense of smell very sensitive to smoke, something essential to survive the fire. The life expectancy of the average zebra is about thirty years, but in captivity can live up to forty years. In the wild, where predators are a constant threat to these animals, the average lifespan is about twelve years.
Some zoologists believe that the stripes are a mechanism for camouflage, which works in several ways. For starters, the vertical stripes help the zebra hide in the grass. Although this may seem absurd at first glance considering that grass is neither white nor black is supposed to be effective against the zebra's main predator, the lion, which is color blind. In theory, a zebra that still remain among tall grasses could go unnoticed by a lion. In addition, since zebras are gregarious animals, the stripes help to confuse predators - several zebras that are or seem to move together can be a single large animal, making the lion has trouble choosing a single zebra to attack. A herd of zebra that disperse to escape a predator seemed a confused mass of vertical stripes moving in different directions, causing the predator will follow whatever the view that an individual is separated from his companions. However, biologists have never observed lions seem confused by the stripes of zebras.
Long ago, the zebras did not have black and white stripes have today, but they were all white. When they saw a zebra, some said it was a cross between a horse and a donkey, white, or perhaps a mule. At that time, people have tried to tame the wild horses to ride them and wear them in front of everyone, because they were very beautiful. The zebras were given another name because they were different horses and mules. Unlike its cousins, it was very difficult to capture and train a zebra. One day a zebra was still very young and lost, walking, walking, ended in a settlement. People began to look at her and whispered, thinking of ways to capture it. Zebra frightened, and realizes what he wanted to do. While people started running into the house to look for a network to chase it.
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