BOB GIBBONS / SCIENCE PHOTO LIBRARY BOB GIBBONS / SCIENCE PHOTO LIBRARY
Black rhinoceros (Diceros bicornis), at a waterhole at night, with a lion (Panthera leo, at left) approaching from behind. The lion is the largest African cat and one of the top (apex) predators. The black rhinoceros, found in sub-Saharan Africa, is an endangered species of the rhinoceros. The rhinoceros is a large herbivorous mammal that can reach over a ton in weight. Photographed in Etosha National Park, Namibia.
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