"Blue as a bilberry"
Bleuets/bilberries
Creative Commons Attribution Share AlikeBleuets/bilberries - Credit: peupleloup
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Creative Commons Attribution| 3 | - Credit: arquera / Emi Yañez

 Bilberries are blue-black fruit of the genus Vaccinium. They are sometimes referred to as blaeberry or whortleberry. Blueberries of North America belong to the same group.