Africa

Two deserts in Africa's southwest corner are teeming with unique wildlife.

Among the animals featured are lions, lizards, catfish-hunting birds and elephants.

In the Congo, chimpanzees steal honey, tiny frogs hide their eggs and large male elephants face off.

Two great ocean currents collide off South Africa and have a huge impact on life in the area.

In the Sahara, Grevy's zebras, camels and barn swallows seek water to survive.

A behind-the-scenes look at the show reveals what it takes to make a natural-history series.