Swarm: Nature's Incredible Invasions
BBC FOUR
Monday 16 January 2017 20:00 - 21:00 (60 mins)
2/2. One Million Heads, One Beautiful Mind: Documentary series revealing the swarm intelligence that lies behind animal invasions, featuring bats, herring, crabs and ants. Also in HD. [AD,S]
Swarm: Nature's Incredible Invasions may be available on playback
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