Clouds are forming over the dry plains of the Serengeti and the dinner bell is about to ring for the big cats of Ndutu. See how a pride of lions and two cheetah families tailor their hunt to the landscape and use it to their deadly advantage.

Two East African rivers stand in the way of a massive migration. Over a million wildebeest and thousands of zebras will be forced to cross the Grumeti and Mara Rivers in order to complete their epic annual journey, and every crocodile knows it. As the rivers shift and fluctuate, see how these fierce reptiles adapt to become ultimate predators.

It's known as the coliseum of the wild: Savute. It's a small tract of land in the corner of Africa's vast desert, where three hunting zones meet at a dead end swamp surrounded by dense, thorny desert. Here, big cats meet big prey in the harshest of landscapes, and success depends on how well the predators adapt to the tough environment around them.