49.243 BF1135  –  Tortricidae –  Olethreutinae – Epinotia demarniana – Blotched Tortrix – (Fischer von Röslerstamm, 1840) Adult Micro:  CAT 3 – Very Rare/Scarce/Migrant/Adventive – confusion with leaf mines       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Brown –  Significant Record / Very Rare / Vagrant    
Taxonomy:   Micro   >>  Tortricidae  >> Olethreutinae
Other Name/s: Birch Bell
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
ID pointers: Head and labial palps yellowish. Forewing blackish brown with a large white dorsal blotch at about middle and another towards the wing tips. A reddish-brown tinging at the wing tip corner (apical area).
Distribution:  (First record: 27 June 1996 at Crich Chase, Ambergate )  –  (Last record: 25 June 2025 at Belper )  –  Not listed in Harrison & Sterling (1988) – Eight records since 1996, which appears to be the first time it was recorded in VC57. Assume it to be locally uncommon to rare.
Flight Period: June /  July /  –  On the wing during June-August. Moth Activity: Nocturnal  Crepuscular   – and is attracted to light Photographed: Yes –  Photographed By: Tony Davison, Dave Evans  © All Rights Reserved
*** Last updated on 8 September 2025 by TD ***
Wingspan: 13-15mm
Food Plant: Birch (Betula), Alder (Alnus) and Goat Willow (Salix caprea).
Last Recorded Year: 2025
First Recorded Year: 1996
Last Recorded By – Dave Evans
Last Recorded General Area – Belper

IMAGES BELOW:  Melbourne, Derbyshire – Tony Davison© / Belper (2025) – Dave Evans© 

Distribution Map for Epinotia demarniana

Found 8 records
    ↳ 1 from After 2025
    ↳ 2 from 2020 - 2024
    ↳ 5 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 demarniana

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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 demarniana
( data includes both Larvae and Adult Stages )

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


First/Last Recorded Dates: Epinotia demarniana
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 demarniana
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Epinotia demarniana
AGR: 0%   |   Total % Change: 0%


CUSUM Analysis: Epinotia demarniana
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 21 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 2025, reaching above average levels. The lowest population point occurred near 2024, 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 demarniana
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Epinotia demarniana
( 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 demarniana – 8 records available

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

TaxonSite NameTetradYearDateCountStageSource
Epinotia demarnianaBelperSK34N202525/06/20251adultvc57_irecords_extract
Epinotia demarnianaLongdendale, Wildboar CloughSK09U202430/05/20241adultvc57_irecords_extract
Epinotia demarnianaMelbourne, DerbyshireSK32X202006/01/20201adultvc57_irecords_extract
Epinotia demarnianaTideswell DaleSK17L201607/06/20161adultvc57_irecords_extract
Epinotia demarnianaDovedaleSK15K201007/06/20101Adultvc57_danes_bc_data
Epinotia demarnianaDovedaleSK15K201007/06/20101Adultvc57_danes_bc_data
Epinotia demarnianaBiggin Dale, nr HartingtonSK15P201012/06/20101Adultvc57_danes_bc_data
Epinotia demarnianaCrich Chase, Ambergate (site not precise)SK35L199627/06/19961Adultvc57_danes_bc_data

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