Best time to see: mid Jun to end Jul
Key facts
A large fearsome-looking fly that is becoming very scarce: a national priority species
Habitat: grazed pastures on well-drained soils
Found throughout Wales and southern England, including Essex, but declining throughout its range
Recognition
Bristly looking flies with a bristly, ginger body, up to 30mm long; black and yellow markings, and long spiny legs;
Dart out from a perch to catch other insects, including grasshoppers, beetles and flies, drinking their body fluids
Lifecycle
Adult females lay their eggs on and around animal dung
The grubs enter the soil on hatching and feed on small animals within the dung, such as dung beetle larvae
They spend 3 years in the soil before emerging as adults in the summer, with only a few weeks in which to mate
© Peter Harvey