During their annual migration, wildebeests are forced to find new river crossings in the Serengeti-Mara region. “The animals were being taken by the unfamiliar currents of deep water and had to struggle to get close to the far bank. There were few rocks on which to land and the initial orderly progression soon became a desperate struggle of clambering”, says Lunney. Mara River, Masai Mara National Reserve, Kenya, September 2013. (Photo by Karen Lunney/Smithsonian.com)
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