Large African mammals travel with the wet and dry seasons, changing the habitat.
Some antelope live in tiny places year-round, but many migrate over wide distances.
Wildebeests and zebras migrate over 1,600 kilometres (1,000 miles) in Tanzania's Serengeti.
Herds gather near water holes during the dry season and disperse out during the rains.
Elephants travel long distances to find the greatest food and water.
In southern Africa, hundreds of thousands of springbok followed rainfall patterns.
Overpopulation was controlled by famine, drowning, and illness during these massive migrations.