I have to agree, there does appear to be less insects around. I went for a drive to Merredin and back today, a distance of approx 600km round trip, and I didn't get as many bugs on my windscreen as I would have expected. I use to live in Merredin, (oh those wonderful dark skies) about 30 years ago and I remember then getting lots of bugs on my trip to Perth each weekend. So many, in fact, that I used to have a screen in front of my radiator.
Must be global warming! OR, the bugs have finally been bred with more road sense