As you can see in the top photo, the bees have pretty much finished their work with these few condos. A few people asked so here it is again.
The female mason bee visits flowers to collect pollen for its young. She form a small ball of pollen and nectar in the back of the nesting tube and lays an egg on the ball. She then collects mud to form a cell partition and repeats the pollen ball-egg laying process until she reaches the mouth of the tube where she caps the end with mud. Starting the life cycle in the spring, adult males emerge from tubes first, but must wait for the later appearance of the females in order to mate. This event often coincides with the spring bloom. Females alone, begin founding new nests in holes to make a row of 5-10 cells in each nest. Females collect the pollen and nectar and lay eggs. Their short foraging range is about 100 yards from the nest. Activity continues 4-6 weeks and then adults die. During the summer, larvae develop inside the nests, make cocoons, and become new adults resting in the cells. With the onset of fall, the adults become dormant as they go into hibernation. These bees require some cold temperatures before spring in order to break their dormancy, and the cycle continues.
