Leaf-miner: CAT A – Recorded accepted without the leaf or a photo – Larval Case: C1 – Distinctive Species – 
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– Uncertain/Unknown – Insufficient Data 
– Leaf Miner
– difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required.Confusion Species: Ectoedemia heringi, Ectoedemia albifasciella
ID pointers: Adults are quite distinctive, with two creamy spots and a creamy basal patch on a violet-tinged blackish forewing. Similar to E.herengi.
Distribution: (Last record: 13 November 2025 at Thornsett, Sett Valley ) – Uncertain due to insufficient data. Leaf mines discovered at Markham Vale, Sett Valley and Longdendale in 2025. Most likely the species is overlooked.
General Comment: Notes on images by Christian Heintzen, on Oak Quercus robur in green sector of fallen leaf (A), long narrow corridor along midrib (a) followed by full depth blotch in vein axil (B), long slit along leaf vein on underside of leaf mine (b).
Mine Period Additional: None.
Mine ID Difficulty:
– Easy to identify, generally the leaf mine is distinctive and unlikely to be confused with other species. Mine Type/s: Gallery, Blotch
Mine Feeding Method/s: Case
Mine Comment: Larvae mine the leaves of Oak, initially in a long narrow gallery following a vein along midrib, then creating a triangular blotch between vein and midrib. It can be distinguished from the similar mines of E. heringi by the presence of a slit in the lower epidermis which allows frass and water to pass.
*** Last updated on 8 December 2025 by RP ***
Last Recorded Year: 2025
Last Recorded By – Christian Heintzen
Last Recorded General Area – Thornsett, Sett Valley
Selected Images:
Markham Vale – 27/10/2025 – Mark Radford© / Longdendale 12/11/2025 and Sett Valley 13/11/2025 – Christian Heintzen©
Image Gallery
Distribution Map for Ectoedemia subbimaculella
Found 4 records
↳ 3 from 2025+
↳ from 2020 - 2024
↳ 1 from Before 2020
↳ 3 from 2025+
↳ from 2020 - 2024
↳ 1 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 – Ectoedemia subbimaculella
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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:
Ectoedemia subbimaculella
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Ectoedemia subbimaculella
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Ectoedemia subbimaculella
Adult-only & Anything [Larvae, Pupae, Adult, Mines]
Shading shows moth presence between dates
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Recordings By Year: Ectoedemia subbimaculella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Ectoedemia subbimaculella
AGR: 2.15% | Total % Change: 66.7%
CUSUM Analysis: Ectoedemia subbimaculella
About this chart: CUSUM (Cumulative Sum) charts track long-term trends in moth populations [ filtered by 'Adult' and 'Mine' life stages ] by showing whether each year’s counts are above or below the historical average. Even small shifts build up over time, making trends of growth, stability, or decline easier to see. CUSUM highlights trend-consistency — asking: “Across the years, have moth counts mostly stayed above or below average?”
The data sample has 24 gap year/s here (zero records) between 2000 and 2025. The moth may have been present in those gap years, but no data was available. Too many year-gaps may exaggerate or skew the chart.
Counts for the current year (2025) are pro-rated based on data available up to month 10 (October) to provide a full-year equivalent.
ⓘ
Purple line rises = years better than average; falls = years worse than average.
Peak (best year)
Trough (worst year)
Growth periods
Decline periods
Population peaked around 2025, reaching above average levels. The lowest population point occurred near 2001, showing a significant decline.
What the Y-axis "Cumulative Deviation" means: Cumulative Deviation shows the running total of how each year’s moth population count differs from the long-term average. i
Hectad (10kmx10km) Coverage: Ectoedemia subbimaculella
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Ectoedemia subbimaculella
Ectoedemia subbimaculella
( data includes Adult Stage only )
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 2020-2025.
Mine Periods – Indicative –vs– Recorded Data
Ectoedemia subbimaculella
Ectoedemia subbimaculella
( data includes both Larvae and Adult Stages )
Mine 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 mine periods [month/s]. The coloured lines represent the actual months seen mining, from site observation records received between 2020-2025.
Records Behind the Map and Charts - Ectoedemia subbimaculella – 4 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Thornsett, Sett Valley | SK08D | 13/11/2025 | 1 | Leaf-mine | vc57_irecords_extract |
| Longdendale, Torside Clough | SK09T | 12/11/2025 | 1 | Leaf-mine | vc57_irecords_extract |
| Markham Vale North Tip | SK47L | 27/10/2025 | 3 | mine | vc57_irecords_extract |
| Brackley Gate, nr Coxbench | SK34W | 03/11/2001 | 1 | Larval Mine | vc57_danes_bc_data |