Mountain Mason Bee

Osmia inermis, the mountain mason bee , is a species of mason bee from the family Megachilidae which has a Holarctic distribution. Description A small matt black bee, the females are 10mm long and show some pale hairs on the body while the males are slightly smaller and have an entirely black pubescence over their body. Biology Osmia inermis uses preexisting cavities as nest sites up to 200 brood cells are attached to the underside of stones, to the walls of small cavities in rocks and stones or in an exceptional case to the underside of a discarded heat shield from a vehicle…

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