Millions of wildebeest and zebra follow an annual circular route around the Masai Mara/Serengeti ecosystem in an endless quest for fresh pasture and water. The migration is usually present in the Masai Mara in Kenya between July and October. During this time, dramatic river crossings are the order of the day with crocodiles laying in wait for the wildebeest and zebra.
Between December and March, the migration is found in the southern Serengeti in Tanzania. An estimated 400,000 wildebeest calves are born during a six week period each year - usually between late January and mid-March.