Mason Bee emerges from pvc tube. You will notice a spike in Mason Bee population around your house. Be kind.
My sunflowers had seemed to draw lots of bees in the past. The bee population is down.
I love the bumble bees when they go after the giant sunflowers. They get so drunk with pollen they can not even move. This is really impressive to kids when you pick them up and roll them around in your hand.