Africa

David Attenborough describes some of the wildlife spectacles of southern Africa, starting out in a little-explored rainforest discovered less than a decade ago by scientists who spotted it on satellite maps. There, thousands of butterflies dance for the right to mate, while on a tiny island off Mozambique, green turtles emerge from eggs and begin a hazardous journey to the water - with pied crows and hungry crabs eager to get them. Cameras also capture one of the largest gatherings of great white sharks on the planet as 30 of the predators circle around a dead whale