The Argentine ANT is invading big part of Southern USA.
It's more intelligent than the other ANTS, because they have many reproductive queens, as many as eight for every 1,000 workers, so eliminating a single queen does not stop the colony's ability to breed. When they invade a kitchen, it is not uncommon to see two or three queens foraging along with the workers.
http://en.wikipedia.org/wiki/Argentine_ant
Interesting.