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Although round nesting holes are preferred by mason bee, they will use all kinds of shapes and sizes of holes, including these routered holes. these nests are created by routering grooves in pieces of wood, which are stacked and thus creating the nesting holes. colored markers to help mason bees find their nest can easily be done on wood. some of the ‘unused’ nesting holes are actually used by the bees for their overnight stay. for this reason it is always best to have more nesting holes then the number of female mason bees that are released.
Most of these Beediverse Quicklock corn nesting tunnels are plugged and filled with young developing mason bees. Mud plugs are of varying colors indicating that different females use different sources of mudding material. Three of the nesting holes remain unplugged and look empty although the lower open nesting hole on the lower left, contains a mason bees. It is probably close to filling its nesting tunnel. These nesting trays are of the newer ‘wood’ colors except the blue which gives the trays some color to help with the bees’ orientation. Overall, this spring nesting was mostly successful. In many cases, production looks like it will be more than the number of cocoons set out in the early spring.