Mason Bee house. Great tutorial.They aren’t aggressive like honey bees and don’t sting unless you torture them. They are much more efficient at pollinating compared to their continental cousins. Two of the types of solitary bees we see in this region are Leaf-cutter Bees(Megachile spp.) and Mason Bees (Osmia spp.)One third of this country’s honey bees disappeared last year, on top of the third of their population lost the year before–a frightening proposition for anyone who eats.