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Which Animals Form The Largest Colonies?
Ants
Swallows
Flamingos
Termites


Answer: Ants

Ants are, hands down, the most successful animal colonizers on the planet and the only animals, big or small, to rival the sheer scale of human colonization of planet Earth.

The most successful of all ant species is the Argentine ant. Originally native to South America, the ant has slowly spread, hitch hiking with humans, across the entire globe. The Argentine ants are well known for forming vast colonies with hundreds of millions of ants living in an enormous inter-connected home.

The largest known Argentine ant colony stretches over 3,700 miles through Europe and down along the Mediterranean coast. While not all colonies are so large that they cross dozens of international borders, the world is covered by several mega colonies–the state of California is, for example, effectively one giant Argentina ant colony.

Even more interesting is that ants from Argentina ant colonies separated by oceans (such as those you would find in France and in California) recognize each other as members of what amounts to a global mega-colony of Argentina ants and will not attack each other. If they could get across the oceans ants from any of the continental colonies could travel unharmed through the tens of thousands of miles of underground roads the individual super colonies have built.

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