Mason bees

I'm happy to give them a name and a home, are they good pollinators? Not that it matters, I'm still happy to have them, especially as they don't seem to sting. I will spend some time researching them.

No, they don't sting. Every summer, our golf club puts up a notice warning visitors that some of the bunkers have miner bees in them and to just ignore them as they are harmless.