David Attenborough's Conquest of the Skies

Creatures that glide, including the harlequin tree frog

The veteran naturalist visits the jungles of Borneo to meet creatures that like to glide through life - the harlequin tree frog and the little-known colugo - often referred to, incorrectly, as a flying lemur. He also has a CGI-assisted encounter with the first true vertebrate flyer, the pterosaur, receives a flying lesson from a small flock of swans at Loch Lomond in Scotland and encounters the planet's largest species of bat