Where have all the insects gone – and why does it matter — asks Erin McDaid of the Nottinghamshire Wildlife Trust. If, like me, you spend a lot of time outdoors, whether you are simply walking the dog, gardening or visiting local parks and nature reserves, I’d hazard a guess that you too have noticed that the number of flying insects has been lower than usual this year. As a keen gardener, I have been struck by the lack of bees and hoverflies and butterflies have been particularly conspicuous by their absence both in the garden and at my allotment. Rarely have I had an opportunity to enjoy wat…