This study appears to be an alarmist rehash of what was previously discussed on HN: https://news.ycombinator.com/item?id=14323533 Here's one of the original papers: https://www.farmlandbirds.net/sites/default/files/Orbrioch%2... The 75% decline number appears to be from two data points from a 220-acre plot. From that paper: "What follows is a description of measured Insect-Biomasses from samples collected in the Orbr…
Alarms have a very useful function: to alert you to impending danger. That's why it's useful to conduct fire drills and spend some time/money on tools and methods that you hope never to have to use, notwithstanding the cost of occasional false positives.
I've noticed that people who say 'oh you worry too much' are never around to help when things actually go wrong, so I pay increasingly little attention to drive-by naysayers.