Super ant colony hits Australia
A giant colony of ants stretching 100km (62 miles) has been discovered in the Australian city of Melbourne, threatening local insect species. The ants, which were imported from Argentina, are ranked among the world's 100 worst animal invaders.
This is a fascinating story. In their native land, rival ant colonies go to war and keep each other in check. Because there is only one colony in Melbourne, it has just grown and grown to become a super-colony.