11.001 BF180 – Yellow-headed Bagworm – Diplodoma laichartingella – (Linnaeus, 1758)
Adult Micro: CAT 3 – Very rare or scarce species (includes very scarce adventives/immigrants) – 
Leaf-miner: CAT A – Recorded accepted without the leaf or a photo – Larval Case: C1 – Distinctive Species –
– click for General Verification Guidelines | – click for Specific Verification Guidelines
Leaf-miner: CAT A – Recorded accepted without the leaf or a photo – Larval Case: C1 – Distinctive Species – – click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Significant Record / Very Rare / Vagrant 
– Day-flying
– care required in the identification process, as confusion with similar species is likely – quality photographs required. Confusion Species: Narycia duplicella larval case; Dahlica triquetrella larval case
ID pointers: There is a clear demarcation between the creamy white and fuscous forewing. A white head
Distribution: (First record: 1892 at Wirksworth ) – (Last record: 26 February 2026 at Staveley Hall ) – Was a common species across Britain, has now become rare – Harrison and Sterling (1988) list one record from Derbyshire 1892 -Wirksworth. The larval cases were found at Staveley Hall on 26th February 2026. Most probably under-recorded as the species rarely comes to light
General Comment: A two year larval period. Cases can meaure up to 11.5mm which are ade-up of a variety of insect fragments which can include beetle elytra, shed spider and centipede skin. Cases can also include tiny particles of grit, sand and other detritus. The cases are very distinctive and are roughly triangular-shaped, especially in cross-section, tapered at both ends.
The larval case is double-layered consisting of a hard inner silken tube which is protected by an outer case that is more loosely constructed.
Narycia duplicella has a much smaller larval case at around 6mm and has a “fin-like” projection on the upper surface.
Dahlica triquetrella also has a triangular shaped case, especially in cross section, but typically uses finer granules of sand and lichen rather than incorporating insect fragments.
*** Last updated on 29 March 2026 by RP ***
Last Recorded Year: 2026
First Recorded Year: 1892
Last Recorded By – Not Recorded
Last Recorded General Area – Staveley Hall
Selected Images:
Staveley Hall 26/2/2026 Mark Radford©
Image Gallery
Temporal Distribution Chart
Immatures: (between 2026 - 2026)
(click legend below to show/hide datasets)
This chart summarises all available historical occurrence records collated by ISO week of the year. It reflects recorder effort and sampling distribution as well as true biological activity, and should be interpreted as an indicative pattern of seasonal occurrence rather than a statistically controlled abundance or phenology model.
Distribution Map for Diplodoma laichartingella
Found 2 records
↳ 2 from 2026+
↳ from 2020 - 2025
↳ from Before 2020
↳ 2 from 2026+
↳ from 2020 - 2025
↳ from Before 2020
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Bedrock Geology ** indirectly affects moth distribution by influencing the type of habitat and food plants available in an area. In turn, this may affect the types of moths that can thrive, or where they can most likely be found.
NBN Atlas UK Distribution for – Diplodoma laichartingella
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Note – the NBN Atlas datasets are listed in the map below and vary in their currency (uptodateness) – however,
the map does give a general indication of the moth's distribution across the UK.
Monthly Records By Year:
Diplodoma laichartingella
( data includes both Larvae and Adult Stages )
Monthly Counts By Year:
Diplodoma laichartingella
( data is based on 'Adult' stage records only )
First/Last Recorded Dates: Diplodoma laichartingella
Adult-only & Anything [Larvae, Pupae, Adult, Mines]
Shading shows moth presence between dates
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Recordings By Year: Diplodoma laichartingella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Diplodoma laichartingella
AGR: 0% | Total % Change: 0%
Diplodoma laichartingella
Insufficient records/data for an AGR analysis
Years Analysed: 2000 – 2026
Hectad (10kmx10km) Coverage: Diplodoma laichartingella
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Diplodoma laichartingella
Diplodoma laichartingella
Flight Period chart – the grey hatched area above, which can cross one or more months, pictorially represents the best guess we have for this moth's flight periods [month/s]. The coloured lines represent the actual months seen in flight, from site observation records received between 2020-2026.
Records Behind the Map and Charts - Diplodoma laichartingella – 2 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Recorder | Source | RecordKey |
|---|---|---|---|---|---|---|---|
| Markham Vale South Tip | SK47K | 19/03/2026 | 6 | larval case | Radford, Mark | vc57_irecords_extract | iBRC50667632 |
| Staveley Hall | SK47H | 26/02/2026 | 5 | larval case | Radford, Mark | vc57_irecords_extract | iBRC50366189 |