Polietes lardarius

Description

Length about 10 mm. This is a large muscid, superficially looking like a sarcophagid flesh-fly. It has a blue-grey chequered abdomen and jagged stripes on the thorax. The scutellum also usually has stripes or blotches. It has silvery dusting on the face and a silver/grey anterior spiracle.

Similar Species

Polietes meriodionalis is very similar (and was once thought to be the same species) but can be distinguished by the yellow anterior spiracle and yellow/gold dusting on the face.

Identification difficulty
ID checklist (your specimen should have all of these features)
  • Large – bluebottle like
  • Front spiracle – brown/ part grey
  • Parafacia – shifting gold dusting
  • Prosternum hairy at edges
  • Occiput setae – all black
  • Male with ~6 av setae on hind tib

 

Recording advice

Good images of both the top and the side of the fly are needed.

Habitat

Particularly common around cattle grazing areas. It likes to perch on walls, fences and foliage in the sun.

When to see it

From summer to late autumn.

Life History

Breeds in dung. Adults are also attracted to Stinkhorn fungi.

UK Status

Common and widespread in England and Wales, fewer records from Scotland.

VC55 Status

Common in Leicestershire and Rutland

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:
32
First record:
15/06/2007 (Nicholls, David)
Last record:
04/11/2025 (Nicholls, David)

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.

In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.

Latest images

Latest records