49.230 BF1151  –  Tortricidae –  Olethreutinae – Epinotia trigonella – White-blotched Roller – (Linnaeus, 1758) Adult Micro:  CAT 2 – Confusion Species –       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Green –  Rare / Uncommon / Scarce   
Taxonomy:   Micro   >>  Tortricidae  >> Olethreutinae
** Photograph required; identification write up required **
Other Name/s: White-blotch Bell
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species:  Epinotia demarniana (Blotched Tortrix)
Distribution:  (Last record: 9 January 2008 at Glossop )  –  Likely uncommon – DaNES shows 7 records widespread between 1969 and 2008 – last record 1/9/2008 Glossop.
Flight Period: August /  September /  –  An autumn flying species during August-September favouring heathland, mosses and open woodland. Moth Activity: Crepuscular   – is often seen during the day Photographed: No –  Photographed By: Not Recorded
*** Last updated on 7 May 2025 by RP ***
Wingspan: 16-21mm
Food Plant: Birch
Last Recorded Year: 2008
Last Recorded By – DaNES
Last Recorded General Area – Glossop

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Distribution Map for Epinotia trigonella

Found 7 records
    ↳ 0 from After 2025
    ↳ 0 from 2020 - 2024
    ↳ 7 from Before 2020

If the Map Layers function fails, just refresh the page and it should be OK after. Use the +- zoom on the top left, or on a tablet, use two fingers to zoom. Remember, the last layer you ticked is the one which displays the popup information - they sit on top of each other - de-select then re-select, to see the popup values.

******* Choose ONLY one at a time, of either Monad, Tetrad or Hectad Distribution - each has it's own set of data. Also, the distribution maps cover ALL recorded data. *******

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.

Land-cover * shows the variety of land-cover within the VC57 area, based on the CORINE (Coordination of Information on the Environment) forty-four thematic classes of land-cover. This will show, to a greater or lesser degree, the number and variety of moths found in different land-cover types. The UK continues to operate within the Copernicus programme, with the UK Centre for Ecology & Hydrology (UKCEH) providing Corine Land Cover (CLC) datasets for the UK and its territories.


NBN Atlas UK Distribution for – Epinotia trigonella

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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.

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Monthly Records By Year: Epinotia trigonella
( data includes both Larvae and Adult Stages )
No data returned from the database.

Monthly Counts By Year: Epinotia trigonella
( data is based on 'Adult' stage records only. )


First/Last Recorded Dates: Epinotia trigonella
Adult-only & Anything [Larvae, Pupae, Adult, Mines]

Shading shows moth presence between dates

Click the colour discs below to Select/De-select as Required

Recordings By Year: Epinotia trigonella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Epinotia trigonella
AGR: 8.45%   |   Total % Change: 50%


CUSUM Analysis: Epinotia trigonella
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 22 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 7 (July) 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 2008, reaching above average levels. The lowest population point occurred near 2005, 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: Epinotia trigonella
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Epinotia trigonella
( 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.

Records Behind the Map and Charts - Epinotia trigonella – 7 records available

Listed by Year - descending - scroll across to see all table columns

TaxonSite NameTetradYearDateCountStageSource
Epinotia trigonellaGlossop (Shire Hill Quarry)SK09M200801/09/20081Adultvc57_danes_bc_data
Epinotia trigonellaFlash Lane,Beeley MoorSK26X200829/08/20082Adultvc57_danes_bc_data
Epinotia trigonellaLeash Fen area, Clod Hill Moor, BaslowSK27W200528/08/20051Adultvc57_danes_bc_data
Epinotia trigonellaEdgecote Drive,Newhall,SwadlincoteSK22V200429/07/20041Adultvc57_danes_bc_data
Epinotia trigonellaLongshaw Est, Padley GorgeSK28K200322/08/20031Adultvc57_danes_bc_data
Epinotia trigonellaBlacka Moor,TotleySK28V199925/08/19991Adultvc57_danes_bc_data
Epinotia trigonellaWragg's Quarry,Rowsley MoorSK26Y196931/08/19691Adultvc57_danes_bc_data

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