I majored in entomology in college, and have a lifelong love and fascination with insects. I also have Asperger’s which gives me a hyper focus on my passion, in this case- the natural world, so I often notice patterns others do not see ... that said—
The valley where I live has large plantings of potatoes, among other things, and I have watched in dismay over the past 20 years as first the honey and bumblebees disappeared, then the bullfrogs disappeared, and now the butterfly and moths are almost completely gone. It is depressing to watch it happening and nothing being done to determine the cause.
I strongly suspect it is related to something being sprayed on the potato crops (grown exclusively for potato chips here abouts), in an effort to control the Colorado Potato Beetle, but I have no way to test my hypothesis. I wish someone would research this, I am too old to undertake such a study.
At least in my area we are paying a huge price for all the potato chips we eat... This is one of the rare instances when I wish a government agency would step in and require someone to do some honest tests, as I’m certain Lays and Wise, et al, would be strongly against testing...