Colonising the land, sea and air, could birds be the greatest group of animals on Earth?
Discover what it really means to be a penguin with Spy in the Huddle.
Feathered and winged, they roam the world's skies. Some have even reverted back to land.
Michaela Strachan and African penguins makes for a great combination.
Nigel Marven encounters penguin colonies, birds of prey and swathes of breeding sea birds.
Gannets are large, yellow-headed seabirds with a voracious appetite for sardines.
Fly over Africa on the back of a vulture and see the African continent with fresh eyes.
Condors soar along the Andes and scarlet macaws explore the heart of the Amazon.
Earthflight also relied on some extraordinary relationships.
We soar with cranes and geese over Venice, the white cliffs of Dover and Edinburgh.
Demoiselle cranes negotiate a Himalayan pass while bar-headed geese fly five miles above.
Penguins are perfectly adapted for an aquatic life.
Owls are some of the most widely dispersed birds in the world.
Images from the North American episode of Earthflight.