Swarm: Nature's Incredible Invasions Episode Guide

Episode Guide

• Season 1 Episode 2: One Million Heads, One Beautiful Mind

  Concluding the two-part documentary looking at awe-inspiring animal swarms with an examination of collective intelligence as a means of escaping predators. The latest camera techniques show how millions of free-tailed bats form a living tornado and shoals of herring shape-shift across the ocean floor. Plus, how some shorebirds synchronise their migration with the spawning season of the horseshoe crab. David Tennant narrates

• Season 1 Episode 1: When Worlds Collide

  First in a two-part documentary looking at the awe-inspiring world of animal swarms. The latest camera techniques take viewers to the heart of the action, revealing how the creatures view the world around them, while footage from camcorders and mobile phones captures the impact they can have. Highlights include killer bees mounting an attack on a football match in Costa Rica, a sea of mice raiding farms in South Australia and 10 million starlings flying over Rome. David Tennant narrates