The Argentine ant (Linepithema humile) has a supercolony on every continent except Antarctica. An Argentine colony in California spans 900km along the coast, while another in Europe is thought to span 6,000km of Mediterranean coastline. A 2010 study demonstrated that individual Argentine ants taken from different continents do not fight with one another, which indicates that they are all, in fact, part of one global supercolony. (http://bit.ly/2lu8EYS, https://bbc.in/2KnuOKw)