Hymenoptera: Andrenidae - Mining bees Andrena bucephala (m) Big-headed Mining Bee Rare, local distribution in southern England and south Wales in open deciduous woodland, grassland, parkland, gardens. Nests in compact aggregations with a single entrance Flies mid April to late May or (occasionally) mid June Polylectic, often on flowers of hawthorn (Crataegus monogyna) and maple (Acer spp.). In Dorset usually associated with Field Maple Cleptoparasite: Nomada hirtipes

Andrena bucephala, Big-headed Mining Bee
Kingston Lacy allotments, Dorset. May 2019