'Flight' is the story of seven of these amazing birds and their incredible journeys around the globe. You'll meet the arctic tern, which covers the distance from the Earth to the Moon and back three times in its lifetime. And the humble swallow, whose epic migration takes it through Europe, across the Sahara Desert and all the way to the tip of South Africa. Along the way, you'll discover history and folklore from around the world that reveal the special relationship between humans and birds.