photo issued by Buglife of &#39;splatometer&#39; used in the survey on a number plate. A citizen science project asking people to count squashed bugs on their car number plates suggests flying insects have declined nearly 60% in less than 20 years. The "windscreen phenomenon" is anecdotal evidence from drivers that they collect fewer moths, flies, aphids, bees and flying beetles on their windscreens than they did in the past. Issue date: Thursday May 5, 2022.