Just looked it up, found this webpage about it
https://beefriendlytrust.org/time-is-running-out-for-bees/...apparently it does represent the dying off of bee's and other pollinators.
I've read quite a bit on the subject(primarily bee's) over the years, and even suggested more areas of rugged terrain to be provided that'd allow for wildflowers to grow on them to perhaps help declining bee numbers bounce back;
I got the idea after noticing how packed full of bee's and other pollinators a small patch of wasteland grass that has a variety of wildflowers growing on it near my home was.
There's a parasite that's possibly related to declining bee numbers too.
Many orchards have bee hives on them, where the bee's are used to pollinate the growing fruit.
Whether there's a connection between the aforementioned orchards and declining bee numbers is open to debate; perhaps pesticides having an adverse affect on them, or possibly the restricted diet?