Bee Bereavement?

Bees are very important insect pollinators. Some species are, of course, also commercially-important because they produce honey and bees-wax. A survey of museum, university and citizen science records has revealed, however, that 25% of the world's bee species have not been seen since the 1990's (https://www.theguardian.com/environment/2021/jan/22/quarter-of-known-bee-species-have-not-been-recorded-since-1990). The failure to find certain bee species in more recent records (2006-2015), does not mean they are now extinct but it clearly confirms the declining numbers of all such insects. Habitat destruction and the use of pesticides (especially neonicotinoids) are probably major factors in this phenomenon.