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For Insects, Spiders & Their Kin
For the United States & Canada
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Genus Osmia - Mason Bees

Bee - Osmia integra Osmia? - Osmia montana Osmiini 01b - Osmia coloradensis bee - Osmia distincta - female Bee house, the next generation - Osmia cornifrons - male Bee - Osmia lignaria - female Metallic green bee - Osmia ribifloris - male Mason Bee - Osmia taurus - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
No Taxon (Anthophila (Apoidea) - Bees)
Family Megachilidae (Leaf-cutter Bees, Mason Bees, and allies)
Subfamily Megachilinae
Tribe Osmiini
Genus Osmia (Mason Bees)
Explanation of Names
Author: Panzer, 1806
~150 spp. in 9 subgenera our area, >350 spp. in 23 subgenera worldwide(1)
Metallic green, blue or blue-green, with short, robust body.
Holarctic, with 1 sp. ranging into the Neotropics [map](1)
Most species early-late spring, a few active in summer.
(starts flying in Jan. in sw US, and in Mar. elsewhere)
Many species visit Vaccinium, including blueberries, and other Ericaceae.
Variety of nesting; some excavate in the soil, others use hollow stems. They partition the cells with walls made of clay or other materials.