Big-headed ants, introduced to Kenya’s Ol Pejeta Conservancy, have significantly altered local wildlife through a chain reaction. University of Wyoming research shows these Mauritius-origin ants displace native acacia ants. These acacia ants guard whistling-thorn trees from elephant overgrazing. With acacia ants gone, unopposed elephants overgraze acacia trees. This diminishes tree cover. Such a reduction affects […]
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