Eudasyphora cyanicolor

Description

6.5-8mm. Resembling a bluebottle with its bright glossy blue thorax, abdomen and scutellum, but with very different wing venation. Vein m gently curves upwards towards the wing edge (giving the fly the occasional common name of Blue Curve-vein). There is a white dusted patch at the front of the thorax, just behind the head. Both flies in the Eudasyphora genus have a strong posteroventral seta on the mid tibia and this is particularly strong in E. cyanicolor. The eyes are bare and the rear spiracle is dark.

Similar Species

The very common Eudasyphora cyanella (the only other UK species in the genus) has a green thorax and a paler blue abdomen.It also has hairy eyes and a pale rear spiracle.

Identification difficulty
ID checklist (your specimen should have all of these features)
  • 6.5-8mm
  • Deep glossy blue thorax, abdomen & scutellum
  • Bare eyes (or nearly so)
  • Strong posteroventral seta on the mid tibia (near the middle)
  • Vein m gently curving upwards
  • Rear spiracle dark
  • Vein r1 with short setae
Habitat

Prefers shade so often associated with woodland.

When to see it

Adults fly between March and October. Over-wintering adults may be found under bark or in other well-protected spaces.

Life History

Believed to be copraphageous.

UK Status

Commoner in the north and west, less so in the Midlands and East.

VC55 Status

Uncommon.

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Species profile

Species group:
insect - true fly (Diptera)
Kingdom:
Animalia
Order:
Diptera
Family:
Muscidae
Records on NatureSpot:
2
First record:
24/02/2025 (Nicholls, David)
Last record:
21/06/2025 (Nicholls, David)

Total records by month

% of records within its species group

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