"This represents the second highest annual loss recorded to date"
So... we've been here before and they recovered just fine?
As someone who sat and played the Foxes and Rabbits game on their ZX Spectrum (Game of Life I believe it was called or similar?), even as a child I took away that the simplest of rules and systems can result in potentially chaotic behaviour and it's hard to even estimate if it will dip or grow after even the most severe of drops.
Honeybees aren't *endangered* from what I can see - there's just a huge variation in the colonies. Maybe the efforts one year to preserve and encourage new colonies overwhelmed some other resource or caused overpopulation which is now taking effect in recurring a dip.
I'm not saying it's not potentially important - but dire warnings when we literally say in the same sentence "but we don't know why" are useless. Find out why, by all means. Increase funding for research. But it's scaremongering to do that without also mentioning "Well, it might just be natural variation, we don't know".
There are animals out there that surface on prime numbered years to avoid predators who return on a regular basis, and their predator's behaviour evolves quickly to take account but - obviously - in the meantime a lot of their predators will die out because they can't adjust that quickly. And then when the predator's catch on to it, the natural selection means that the prime numbered intervals they surface on actually CHANGES over time - obviously after a particularly bad year, a slow boom happens until the predators catch on again.
Research is needed. But scaremongering is not a fair way to get funding for that.
As is the default in all science: We just don't know. Until we know, any action we take may actually be making the situation WORSE.