Oak-apple-gall-nester
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Osmia simillima
Osmia simillima is a solitary mason bee in the family Megachilidae, native to North America. It nests in twigs, buried wood, and has been observed using oak apple galls as nesting sites. As a member of the genus Osmia, it belongs to a group of ecologically important pollinators that use mud to construct and seal nest chambers.