Computer graphics recreate the period 150 million years ago when small, fast-running dinosaurs evolved feathers and took to the air. In New Zealand, David examines the environment required by birds which have survived without recourse to flight, and enjoys a midnight encounter with a kiwi, captured on a starlight-sensitive camera.

Using state-of-the-art 3D animation and a trip in a glider to show how birds have perfected the art of flying, the programme analyses how different species have evolved unique skills, from high-speed hunting at 200 miles per hour to precision hovering and the endurance to migrate thousands of miles.

Focusing on the remarkable variety of feeding habits employed by birds, from the hummingbird whose long beak can sup nectar from the deepest blooms, to the acorn woodpecker which peppers the trunks of trees with hundred of holes to store enormous quantities of food.

David Attenborough looks at birds of prey, from meat-eating parrots in New Zealand to African eagles capable of catching monkeys and flamingos.

A focus on the remarkable variety of aquatic birds, from ducks, kingfishers and penguins, to one of the most bizarre birds of the series: the shoebill.

David Attenborough reveals how birds have become highly sophisticated communicators, using extraordinary patterns of colour and beautiful songs to deter predators, intimidate rivals, and impress potential mates.