Over all length 14 - 20mm. The largest of the tachinid flies, looks a little like a bumblebee. The thorax and abdomen are black and very hairy, the head is pale yellowish-white.
Woodland edges and heathlands. Lays its eggs on hairy caterpillars.
Status and distribution
Widespread but local in Britain. One record for the reserve.
Best time to see
July to August.