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Published on Apr 22, 2012
A little clip taken a few days after my mason bees began to emerge this Spring. Bees emerging from last year's nesting straws in the plastic hanging bag, and the new females are now choosing straws to lay their eggs in. With mud, the females will create 4-6 chambers in each tube, leaving an egg and pollen for the larva to eat and grow on. These are mostly horn faced mason bees and blue orchard mason bees. I put a plastic bag (with an open bottom so they can escape) over the old tubes to discourage the emerging females from re-using last year's dirty tubes, and to use the clean new straws in the nesting box instead. Using clean new paper tube liners each year keeps parasites, pollen mites, and mold to a minimum.