Africa (2013) 4/6

Africa is a 2013 British documentary series created by the BBC Natural History Unit. It focuses on wildlife and wild habitats in Africa, and was four years in the making.
Episode 4 - Cape
The fourth instalment shows how Southern Africa is influenced by two very different ocean currents. The warm Agulhas Current generates rainfall in Mozambique's interior, where butterflies gather on the summit of Mount Mabu to court and breed. The cold Benguela Current influences the Western Cape, where little rain falls. The intense heat makes incubating eggs a difficult prospect for African penguins. In spring, as Namaqualand is transformed into a desert garden, the drama of a monkey beetle's love life plays out in a single flower. Springbok dance in the rainy season for joy. Great white sharks, a school of dolphins 5000 strong, and a 15 m Bryde's whale are filmed in the rich feeding grounds of the Atlantic.

Southern Africa is a riot of life and colour because of two great ocean currents that sweep around the continent's Cape. To the east, the warm Agulhas current, generating clouds that roll inland to the wettest place in southern Africa. To the west is the cold Benguela current, home to more great white sharks than anywhere else. Moisture-laden fog rolls inland, supporting wonderful desert garden. And where the two currents meet, the clash of warm and cold water creates one of the world's most fabulous natural spectacles: South Africa's sardine run. This is the greatest gathering of predators on the planet, including Africa's largest, the brydes whale.