PLEA Network

10 November 2015, The Guardian, New insect arrivals signal radical climate change – we can’t say we’ve not been warned. The exotic species colonising the south coast are the experts when it comes to adapting and surviving. We should learn from them. Something stunning happened last week, which has never before occurred in Britain in November: a subtropical butterfly, the long-tailed blue, was seen flying on the south coast of England. Another unprecedented event took place one August evening: a volunteer at the Dungeness bird observatory was strolling home from the pub when he was transported to summer holidays on Mediterranean verandas – he heard the nocturnal whirring of tree crickets. Hundreds of these warmth-loving insects have now been found breeding in Britain for the first time. Exceptional insects are the new normal. The long-tailed blue is a common sight across Africa, south Asia and Australia. Very occasionally – in 1945 and again in 1990 – warm winds push a couple of dozen to Britain. In 2013, however, more than 100 individuals were spotted between Bognor and Dover. This year has seen another 60 mostly British-born specimens emerging spectacularly late in the year for any butterfly, let alone a subtropical creature. We struggle to act on climate change because it involves restraining consumption – of fossil fuel – and we as a species find it hard to practise restraint. We are also struggling because arguments focused on parts per million of CO₂ are abstract and remote from real experience. Insects could help us realise just how radically our climate is changing. Forgive an obvious animal cliche, but they are the canary in the coal mine. Along with tree bumblebees, another very visible newcomer in Britain, we might describe them as the first climate refugees to reach our shores. Read More here