Zombee parasite new challenge for imperilled Honey Bees

My fellow beekeeper friend Robert MacKimmie is interviewed explaining the zombee parasite.  This parasite, a tiny fly, was first discovered in the Bay Area back in 2011.  A citizen science outreach program has been documenting the extent of this parasite's range since then.  I have Zombees at my apiary, and what is yet unknown is how badly the pest effects hives.