species 2,527 observations
Blue Mason Bee
Osmia caerulescens
Field notes
Osmia caerulescens, the blue mason bee, is a species of solitary bee from the family Megachilidae. It has a Holarctic distribution extending into the Indomalayan region, although its presence in the Nearctic may be due to human-assisted introduction.
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7
native plants
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Range
Greener is more native, amber more introduced; paler is less certain. How this was decided