The Invaders

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Travel around the world with National Geographic WILD and examine animal species that have taken over new environments in startling numbers, bringing change, destruction, and even danger. These animals now occupy by force, stealth, and sheer numbers. We'll go in depth to find out how the invasion began, what damage has been done, and how communities are combating these animal invaders. Find out what happens when nature's delicate balance goes haywire.