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The Gwynn's Mining Bee (Andrena bicolor) is of the family Andrenidae which is in the genus Andrena. This ground nesting solitary bee has a widespread distribution in Europe extending eastwards to Central Asia but is absent from colder northern regions.
Unlike other Andrena bees which are single brooded (univoltine), Gwynn's mining bee is on the wing from early March to early September, over two generations (bivoltine).
Patrick J. O'Keeffe / Raw Birds