TONY CAMACHO / SCIENCE PHOTO LIBRARY TONY CAMACHO / SCIENCE PHOTO LIBRARY
Male black-faced impalas (Aepyceros melampus petersi) fighting. Only the male possesses the s-shaped horns. The black-faced species of impala is endemic to north-western Namibia and south-western Angola. Photographed in Etosha National Park, Namibia.
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