mining bee
US /ˈmaɪnɪŋ biː/
UK /ˈmaɪnɪŋ biː/
1.
a solitary bee that nests in the ground, typically in burrows dug in sandy soil, and is an important pollinator of various plants
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We observed a mining bee digging its nest in the garden.
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Mining bees are crucial for pollinating early spring flowers.