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The Greatest Show on Earth! At the heart of the Serengeti ecosystem lies an ancient phenomenon that is the largest movement of wildlife on earth. In pursuit of food and water, over one and a half million wildebeest and half a million zebra and antelope migrate north from the Serengeti to the adjoining Maasai Mara reserve in Kenya every year. December to March As the sea of grass provides little cover and the young are easy pickings for a variety of predators, wildebeest have therefore evolved synchronized birthing, which means, about 90% of calves are born within a three-week period. With such a sudden and massive surge of available food, predators do not make any significant dent in the newborn calf population. Wildebeest calves can run minutes after they are born. Within three days the calves are strong enough to keep up with the herd. April to May June Following the rainfalls, the migration moves north before crossing the Kenyan border into the Maasai Mara. Nothing stops the stampeding hordes. Here again, they must cross a river, this time the Mara with its flotillas of hungry crocodiles. All is far from peaceful, for it is the rutting season and each male tries to establish a stamping ground. After moving westwards, the migration divides by some uncanny instinct, one group turning northeast and the other due north. July, August, September, October The mass of grunting wildebeests remain on the productive Mara grasslands until October or November during a time when the rest of the ecosystem is simply too dry to support them. And then, as the storm clouds gather in the south, the vast herds return to their breeding grounds, which, by the time they arrive, are once again green and lush. November The mass of grunting wildebeests remain on the productive Mara grasslands until October or November during a time when the rest of the ecosystem is simply too dry to support them. And then, as the storm clouds gather in the south, the vast herds return to their breeding grounds, which, by the time they arrive, are once again green and lush. The migration is rarely ever precisely the same in terms of timing and direction, as local conditions influence grass growth. So it is, that the wildebeest may move off the open plains earlier in some years, and remain in the northern woodlands for longer, in others.
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