Eriothrix rufomaculata


This is a very common bristly black fly, with prominent orange patches on the sides of its abdomen. It has a silvery face and a mouth that projects forward.

Similar Species

Aphria longirostris also has red abdominal patches but can be separated by its long rigid proboscis which projects out in front of the head.

Identification difficulty
ID guidance
  • red abdominal side-patches
  • silvery face
  • projecting mouth edge
  • long costal spine
  • slightly shaded wings
  • a small petiole on the median vein

Adults are flower-feeders, visiting various flowers including umbellifers and flowers of the Daisy family.

When to see it

June to October.

Life History

Larvae of this species are parasitic, developing inside the larvae of moths.

UK Status

Fairly common and widespread in Britain.

VC55 Status

Fairly common in Leicestershire and Rutland

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map

Species profile

Species group:
Records on NatureSpot:
First record:
23/07/2009 (Calow, Graham)
Last record:
29/08/2023 (Graves, Hazel)

Total records by month

% of records within its species group

10km squares with records

The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.

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Latest records