While analyzing genetic signatures of microbes found in mosquitoes, researchers in Canada were surprised to find black queen cell virus, a common scourge of honey bees. The Aedes vexans mosquitoes in which the virus was identified likely acquired it while foraging for nectar at the same plants as bees, but it’s unclear if mosquitoes have any role in spreading it among bees. (Photo by Katja Schulz via Flickr, CC BY 2.0)