WILLIAM ERVIN / SCIENCE PHOTO LIBRARY WILLIAM ERVIN / SCIENCE PHOTO LIBRARY
Fleeing Thomson's gazelles. View of a fleeing herd of Thomson's gazelles (Gazella thomsoni) on grassland. Thomson's gazelles are the most common gazelles in eastern Africa, inhabiting the open plains and grasslands. They live in large herds, but these are very loose associations, and herds fragment and merge, and members drift between herds seemingly randomly. Dominant males mark out territories around 200 metres across by defecating and urinating. These territories are often very close together, and fights between neighbours are not uncommon. Thomson's gazelles eat mainly grass, with some shoots and leaves. Photographed in the Masai Mara reserve, Kenya.
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