Boxes for Mason Bees. They plug each small hole with mud and each hole has about six bees. A container of water must be set nearby for them to make mud with the bits of soil they gather. Notice the plugged holes and the empty ones.
Mason Bees don't live in hives nor do they swarm or have a queen. They don't even sting, or if they do get really annoyed, it is no worse than a mosquito bite. They like Goldenrod and fruit tree blossoms.

Boxes for Mason Bees. They plug each small hole with mud and each hole has about six bees. A container of water must be set nearby for them to make mud with the bits of soil they gather. Notice the plugged holes and the empty ones.
Mason Bees don't live in hives nor do they swarm or have a queen. They don't even sting, or if they do get really annoyed, it is no worse than a mosquito bite. They like Goldenrod and fruit tree blossoms.