It took many millions of years for evolution to slowly create unique assemblages of plants and animals in each region of our planet, and only a coupl… - Dave Goulson

These are beneficial creatures, and should be celebrated, not persecuted and poisoned in some misguided psychotic urge to kill anything that dares to thrive.

Some previous deliberate introductions of non-native species to Australia had gone horribly wrong: for example, cane toads from South America, introduced to help control sugar cane pests, have themselves become a plague, proliferating to the point where there are now estimated to be about 200 million of them, eating everything except the pests they were intended to control.

Suppose one were to invent a new wheat variety that gave twice the yield. Would the world’s wheat farmers turn half their land over to nature? Of course not. Wheat prices would collapse, and we would find ever-more-wasteful ways of using the surplus, for example by feeding more to animals or using more for biofuels. The farmers would end up farming harder than ever to make ends meet, and nature would not benefit at all.