Over all length 8 - 13mm. A strange-looking, brown and yellow fly that curves its abdomen beneath it as it sits on a leaf.
Woodland edge and hedgerows. The adults are often seen on flowers. They are bee-parasites and lay their eggs on bumblebees and some species of mining bees.
Status and distribution
Quite common and distributed through most of Britain, although it keeps to the lowlands in Scotland. Common on the reserve.
Best time to see
May to September.