Swarm: Nature's Incredible Invasions
BBC FOUR
Monday 9 January 2017 20:00 - 21:00 (60 mins)
1/2. When Worlds Collide: Documentary looking at animal swarms, using the latest camera techniques to look into the heart of a superswarm and reveal how they view our world. Also in HD. [AD,S]
Swarm: Nature's Incredible Invasions may be available on playback
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