Mason Bees get their common names after the materials they use to build their nests. They will use mud, or clay, to build nests for their young.
The Latin name, Osmia, can be translated to the English word 'Odor'; and they are named this because they mark the nest entrances with a lemony scent.
Each scent will differ ever so slightly so each female can quickly locate her own nest. These bees aren't social, but solitary; caring for broods alone.
These bees are significantly docile, and the females will rarely sting. They can do substantial pollination, improving yields of veg, fruit and nut crops.
Combined with their ease of transport, this makes them a popular bee for commercial growers all around the world.