Delia platura

Alternative names
Seedcorn Maggot Fly and as Bean Seed Fly

This small greyish fly is the most commonly recorded of the Anthomyiidae and generally abundant everywhere. It is around 8mm with a dark median line at the front of the scutum (top of the thorax). As with many flies it is under-recorded as it can only be identified by examining a specimen under a microscope.

Similar Species

Other Delia species.

Identification difficulty
ID guidance
  • c7-8mm
  • brown median line on the front scutum
  • hind tibia with a row of around 20 erect and evenly spaces posteroventral hairs
  • hind femur with 4-6 av setae on the distal half
Recording advice

This species has a red ID rating and unless identified by a known expert you must provide a satisfactory explanation of how it was identified for the record to be accepted.


Around various crops including beans, peas, oilseed rape and various brassicas.

When to see it

Mainly a spring species.

Life History

The larvae can cause damage by attacking roots and sprouting seedlings, but also live in rotting vegetation.

UK Status

Widespread and common in England at least.

VC55 Status

Common in Leicestershire and Rutland, and can be abundant where present (but under-recorded).

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:
02/05/2012 (Calow, Graham)
Last record:
21/04/2020 (Nicholls, David)

Total records by month

% of records within its species group

10km squares with records

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