We put out a box for blue orchard mason bees on our balcony, along with some cocoons, but we hadn’t seen any action. The cocoons were all holed and empty, and we feared predators like wasps had gotten all the bees.
Today I was happy to see a slow-moving, but live, mason bee. Hope to see more as the days go by. We’ve set out lots of flowers on the balcony of various species.