insect—ageddon is how the global decline in insect populations has been described by some scientists. one case in germany suggested there had been a 75% decrease in numbers over 27 years. take the humble housefly. you may not like them, but like many insects, they're one of the foundations of the whole food chain. if we lose them, we will lose lots of other species too. but there is actually very little data for many insect groups and species, even here in the uk, which is where this new app comes in. the hope is that in the hands of a small army of citizen scientists it will generate more accurate figures for insect populations. it's simple to use. you clean your number plate before you go on a journey, then when you arrive at your destination you use the app to photograph the bugs