Swarm: Nature's Incredible Invasions: his documentary reveals the awe-inspiring world of animal swarms, discovering what happens when superswarms invade people's lives and, using the latest camera techniques, going to the heart of the swarm to reveal how the creatures therein view our world. Real-life footage from camcorders and mobile phones captures the amazing impact they can have. Killer bees mount an attack on an international football match in Costa Rica; in the US the Illinois River boils with leaping silver carp, an alien species that has hijacked the river, smashing into boats and injuring people.

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Documentary