In a South American jungle we will unravel the secrets of night time "hunt and evasion" flying, as bats and moths fight for the upper hand in one of the world's oldest arms races. And we will take the viewer inside a giant flock for the first time to unlock the secrets that keep half a million birds from colliding in the same air space.

Originally released by BBC, 2016. Streaming video file encoded with permission for digital streaming by Infobase on May 22, 2019.

Introduction: Crowded Skies (2:46); --Aviary Anglers (6:59); -- Aerial Courtship (9:05); -- Brave Parents: Fighting Father (4:45); -- Brave Parents: Dutiful Mother (4:55); -- Flying Pirate (4:31); -- Progressive Aerial Battle (6:09); -- Confusing Predators (7:55); -- Credits: Crowded Skies (0:27); .