Trees are an invaluable resource in the windswept grasslands of Africa's southern Kalahari, providing huge numbers of animals with food and shelter.

The much-loved Sausage Tree stands in the Selinda Reserve in the north-eastern corner of Botswana, where it is dry and the rains are months away. Numerous birds and animals rely on the Sausage Tree for sustenance during this testing period.

In the Afromontane forests of the Soutpansberg grows a giant Outeniqua Yellowwood. A look at how this colossal tree hosts, feeds and shelters an array of plants and animals in the bows of her branches.

Namaqua rock fig trees are the ultimate survivors. As every year gets hotter and drier, this hardy tree stands tall on the slopes of South Africa's hills.

Baobab trees have been around for 800 years. This incredible tree withstands the harshest conditions, and is beloved by animals, birds and insects.