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Swarm: Nature's Incredible Invasions

Episode 1: When Worlds Collide

Duration: 1 hour

on BBC Four

Documentary examining the world of animal swarms, using the latest camera techniques to look into the heart of a superswarm and reveal how they view our world. Show more

BBC Four

About BBC Four

BBC Four reflects arts, music and culture with an ambitious range of intellectually and culturally enriching programmes, taking an expert and in-depth approach to its subjects.