Viruses, pesticides, beekeeping practices, pollination service and varroa mites all contribute to managed commercial honeybee colony health. 

Though there is a lot of hyperbole about the topic these days, aside from a blip that happens quite often (As Norm Benson noted, documentation of sudden losses have been kept as far back as the 900s), commercial colony losses aren't in decline and wild bee populations have been rising steadily since 1960.

But bees are important. So how do we work together to responsibly protect this resource for farmers and beekeepers and nature in general? If you have 3.5 minutes, here is the big culprit: