Okavango: Water in the Desert - S1.E4

The Okavango Delta, in northern Botswana, comprises various wetlands, some (river arms and marshes) deep enough for hippopotamuses to live in, many drying out many months, some barely seasonal waterholes. Many species (like buffalo) and people migrate in and out on the flood rhythm, while only the Bushmen survive all year in the neighboring Kalahari desert.