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Tommys on cheetah alert in the Serengeti
When herds of gazelles are all facing the same direction, ears pointed forward, it is a pretty strong clue that danger is near. In this case two cheetahs are spotted very close by. Given the explosive speed of cheetahs, gazelles know to keep a large gap before running away.
The Thomson's gazelle is one of the best-known gazelles. It is named after explorer Joseph Thomson and is sometimes referred to as a "tommie". It is considered by some to be a subspecies of the red-fronted gazelle and was formerly considered a member of the genus ''Gazella'' within the subgenus ''Eudorcas'', before ''Eudorcas'' was elevated to genus status. Thomson's gazelles can be found in numbers exceeding 500 thousand in Africa and are recognized as the most common type of gazelle in East Africa.
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