Osmia bicolor
Encyclopedia
Osmia bicolor is a species of bee
Bee
Bees are flying insects closely related to wasps and ants, and are known for their role in pollination and for producing honey and beeswax. Bees are a monophyletic lineage within the superfamily Apoidea, presently classified by the unranked taxon name Anthophila...

 in the genus Osmia. It is outstanding amongst other osmiine bees in that it nests in empty snail shells.
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