That's a red herring report and is completely unreliable IMO. It lists poison as unknown but at an absolutely minuscule number, but given what we know about pesticides and herbicides, they are unquestionably the absolute true cause.

Recall that prior to the EU publishing reports showing that glyphosate based herbicides like the incredibly common Roundup were behind "Colony Collapse Disorder" that a whole bunch of false causes were being dolled out and trotted out as the cause.

In the last 5-6 years we've found out that various major pesticide/herbicides have far more wide ranging effects than what the companies selling them have claimed they do. They claimed various pesticides to control root-eating worms, built into GMO crops would last 50-60 years, they lasted 5 before the worms developed immunity. Worse, they did climb up into the flowers when companies like Monsanto said it was impossible; so they were poisoning good bugs along with the targeted ones. Not to mention that they claimed the pesticides wouldn't accumulate in predators that ate the bugs, or in us, and both of those claims are false too.

The cause is pesticides and herbicides, not flipping cats my dude.

Fucking lol.