Our Mason Bee Nursery is busy as of late! The bees are attracted to the bamboo 'tubes' which are perfect for their masonry nests. The top left photo is of a MasonBee flying in with a tiny dab of some type of mud.
These native 'hole-nesting' bees are said to be 'gentle', easy to raise and are amazing pollinators. This Bee 'House' is hanging under our roof's overhang a few feet from our front door. While I constantly 'discourage' wasps, yellow jackets and the such, I always welcome the Masons!