, Volume 50, Issue 1, pp 100–103 | Cite as

Scientific note: cavity-nesting Osmia bruneri bees (Megachilidae) can use fruit pulp for nest construction

  • James H. CaneEmail author
Scientific note


The cavity-nesting solitary bee Osmia bruneri (Hymenoptera: Megachilidae) normally partitions and plugs its nest tunnel with masticated leaf pulp. In 2018, many females of a captive population were observed collecting pulp from drupelets of both unripe and ripe red raspberries (Rubus idaeus) despite available foliage from this plant as well as five weedy forbs. Females capped 122 nests with raspberry pulp, the material that they used for their nests’ cell partitions as well. Such red nest plugs were never produced by the preceding ten captive generations of this bee (about 3000 nests), even when caged with raspberries. Raspberry fruit pulp proved to be of intermediate preference for nest construction among alternative foliar choices offered to nesting females.


Apiformes  Megachilidae  nesting  Osmia bruneri Rubus idaeus 



Byron Love first noticed the red closures and provided some observations. Vince Tepedino provided helpful insights.

Supplementary material

13592_2019_634_MOESM1_ESM.mp4 (5.4 mb)
ESM 1 (MP4 5515 kb)


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Copyright information

© INRA, DIB and Springer-Verlag France SAS, part of Springer Nature 2019

Authors and Affiliations

  1. 1.USDA-ARS Pollinating Insect Research UnitUtah State UniversityLoganUSA

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