Zebras in the Masai Mara . Returning to the water, it is precisely when crossing rivers when nerves and conflict arise . The tension is cut in the environment. It is at this point that the more you narrow your love and even lovers are welcome. I mean, both zebra and wildebeest , are land animals and as such can not do well in anything other than their environment. If we add that down there , in the water and the banks await rubbing teeth , hundreds of Nile crocodiles , needless to say when crossing the river along with the birth - is the most critical of their lives. Apart from the small tributaries and about simple wading streams , several rivers have crossed during migration : the Kirawira , the Sand River, Talek and the most dramatic of all , the Mara River. The time to jump into the water is the most tense of marriage. First begin to approach the shore, one by one, dozens of dozens , hundreds of hundreds . So even thousands . The fleet nervousness in the air and the characteristic sounds of the wildebeest are constantly repeated . They are incessant calls , calls of encouragement and pineapple congregation to do before crossing and once across , still sound as a lure to their relatives who have not yet crossed they decide to do so soon. These short lowing are the favorite music of crocodiles and the soundtrack of migration. Zebras and wildebeest congregate at the top of the ramparts looking for a comfortable descent to the river, but how much more comfortable the slope is cut by a land shaped funnel also the greater the number of crocodiles waiting in the output of the slide. So choose to jump into the water even from great heights . The guidelines are the same . First - them - zebras , more resolute but looking at both sides without really knowing where to shoot , then they , simpler and stubborn to wait for their "people" to begin to cross into the water. After the first , the others follow him without hesitation gets single file . When one is in the intersection just decide to turn around panic sufferer others follow and turn back. Migration river crossing is cut for a few minutes , hours or even until the next day , when zebras and wildebeest return to repeat the ritual. The more zebras and wildebeest is much better during the crossing. The larger the group , the lower the probability that you touching the Chinese alligators . That's convenience in the making. The Masai Mara was opened in 1961. Located west of the Rift Valley and is the natural continuation of the Serengeti plains in Tanzania. The winding , dark waters of the Mara River crossing the reserve from north to south to continue their journey west to Lake Victoria and in Tanzanian land.