I am in awe — they did it without anyone noticing. They just infiltrated nations all around the planet, smuggling in individuals to form vast new colonies of billions, all loyal to the overlords back home. Of course, these are very, very short Argentinians, which made them harder to notice: they’re all ants.
In Europe, one vast colony of Argentine ants is thought to stretch for 6,000km (3,700 miles) along the Mediterranean coast, while another in the US, known as the ‘Californian large’, extends over 900km (560 miles) along the coast of California. A third huge colony exists on the west coast of Japan.
While ants are usually highly territorial, those living within each super-colony are tolerant of one another, even if they live tens or hundreds of kilometres apart. Each super-colony, however, was thought to be quite distinct.
But it now appears that billions of Argentine ants around the world all actually belong to one single global mega-colony.
You better start practicing your tango is you hope to get along with our new arthropod overlords.