World's 7 most horrible animals

Siafu Ants
These ants are also known as driver ants. They come in swarms of up to 50,000,000, and will react as if they are a single entity if even one driver ant is in danger. Crush one of these little critters underfoot while you are out on a walk and you will regret it as the other 50 million come swarming after you.

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