The great wildebeest migration is one of the top attractions of the Maasai Mara and could be a fascinating sight to see on Kenya holidays.
Each June, 1.3 million wildebeest gather in the Serengeti to calve before forming a huge single herd and moving on in July.
A natural phenomenon, the migration happens when the animals run out of fresh grass and scent rain in the north, encouraging them to move on and in turn renewing the grasslands of the Maasai Mara.
Catching sight of the migration is one of the highlights of a safari tour during the summer and is one of the reasons why the Maasai Mara attracts so many tourists.
National tourist board, Magical Kenya, describes the sound of the migration as a "deep, primal rumbling of thundering hooves and low grunts".
At sight, it said the charging mass "stretches from one horizon to the other.
"This endless grey river of life is mottled with black and white as zebras join the throng".
Packs of hyena can also been seen hunting on the young and weak wildebeest.