I use a wedge of corrugated plastic to secure nesting trays into a Highrise home. Corrugated plastic sheeting is made from 100% recyclable plastic and it is easy to cut and fold to fit any cavity. I jam it into the space above the nesting trays and trays are secured into the Highrise.
For the second year in a row, I have had mason bees nesting in these tiny nesting cavities. These tiny cocoons are similar in colour as Osmia lignaria cocoons, but much smaller in size. I have not seen this small bee fly, so I do not know what they look like nor do I know what time of the year they appear. If you have a piece of corrugated plastic, set a piece in amongst your other nest materials and see what happens.
The spring mason bee cocoon is on the left (with its nesting trays on the far left). The tiny summer mason bee cocoon is on the right. |
After slicing the nesting tunnel open you can see how the tiny cocoon fits into the tiny nesting tunnel. |
Closeup of plastic corrugated sheets filled with mud plugs. |