Great Migration Update; Members of the vast wildebeest herd give birth more or less simultaneously, usually over a period of three weeks sometime between January and March, when optimum grazing is available on the short grass plains at the base of the Gol Mountains.
The Great Migration is rarely the same in terms of precise timing and direction, as local conditions influence grass growth. This means that the wildebeest may move off the open plains earlier in some years and remain in the northern woodlands for longer in others.