Epinotia mercuriana       Epinotia nanana
49.240 BF1136  –  Tortricidae –  Olethreutinae – Epinotia immundana – Birch Tortrix  – (Fischer von Röslerstamm, 1839) Adult Micro:  CAT 2 – Confusion Species –       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Blue –  Generally Common / Widespread   
Taxonomy:   Micro   >>  Tortricidae  >> Olethreutinae
Other Name/s: Common Birch Bell
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species:  E. tetraquetrana
ID pointers: Distinctively marked with a diamond shaped patch on the dorsal area. Can be variable in colour, but distinctively marked blackish-brown along the inner margin.
Distribution:  Most probably a localised but fairly common species in the county.
General Comment: None Flight Period: April /  May /  June /  August –  On the wing during April – June and August. Moth Activity: Nocturnal  Crepuscular   – active from dusk into the night Photographed: Yes –  Photographed By: Steve Thorpe, Dave Evans  © All Rights Reserved
*** Last updated on 2 October 2025 by RP ***
Wingspan: 12-14mm
 Food Plant: Alder (Alnus glutinosa) and Birch (Betula).
Recorded dates for Common [Blue code Blue-coded] moths are not stored on the website at this current time.
Selected Images:  Breaston, Derbyshire – Steve Thorpe© / Belper (2024) – Dave Evans©

Epinotia immundana - Steve Thorpe
Epinotia immundana – Breaston – Steve Thorpe
Epinotia immundana - 2nd May 2024 -Belper - Dave Evans
Epinotia immundana – 2nd May 2024 -Belper – Dave Evans
Epinotia immundana - Steve Thorpe
Epinotia immundana - 2nd May 2024 -Belper - Dave Evans


Image Gallery

No gallery images found for this moth.


Distribution Map for Epinotia immundana

Found 44 records
    ↳ 14 from After 2025
    ↳ 24 from 2020 - 2024
    ↳ 6 from Before 2020
Flying
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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.

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 – Epinotia immundana

⚠️ Please wait for the map to load fully – do not click the link shown.


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.

Visit NBN Site


Monthly Records By Year: Epinotia immundana
( data includes both Larvae and Adult Stages )

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


First/Last Recorded Dates: Epinotia immundana
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 immundana
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Epinotia immundana
AGR: 1.2%   |   Total % Change: 28.6%


CUSUM Analysis: Epinotia immundana
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 17 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 9 (September) 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 2021, 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 immundana
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Epinotia immundana
( 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 immundana – 44 records available

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

Site NameTetradDateCountStageSource
Chellaston, Derby, DerbySK33V10/09/20251adultvc57_irecords_extract
Norton Lees, SheffieldSK38L22/08/20251adultvc57_irecords_extract
BelperSK34U13/08/20251adultvc57_irecords_extract
Belper, DerbyshireSK34N13/08/20251adultvc57_irecords_extract
Norton Lees, SheffieldSK38L11/08/20251adultvc57_irecords_extract
BelperSK34N11/08/20251adultvc57_irecords_extract
BelperSK34N25/06/20251adultvc57_irecords_extract
Glossop, Gnat Hole Rough FieldsSK09L24/06/20251adultvc57_irecords_extract
Markham Vale DerbyshireSK47K11/05/20254adultvc57_irecords_extract
Havercroft RoadSK38L02/05/20251Adultvc57_irecords_extract
BelperSK34U01/05/20251adultvc57_irecords_extract
King's NewtonSK32Y01/05/20252adultvc57_irecords_extract
Upper PadleySK27P22/04/20251Adultvc57_irecords_extract
Belper, DerbyshireSK34N11/04/20251adultvc57_irecords_extract
Peewit CarrSK44L22/12/20241larvavc57_irecords_extract
King's NewtonSK32Y02/09/20241adultvc57_irecords_extract
Allestree, DerbySK33P13/08/20241adultvc57_irecords_extract
Derbyshire, UKSK15J11/08/20241Adultvc57_irecords_extract
Allestree, DerbySK33P29/07/20241adultvc57_irecords_extract
Glossop, The TwitchlingsSK09M17/05/20241adultvc57_irecords_extract
Midway, Derbys.SK32A17/05/20241adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G15/05/20241adultvc57_irecords_extract
BelperSK34U12/05/20241adultvc57_irecords_extract
Glossop, The TwitchlingsSK09K11/05/20243adultvc57_irecords_extract
BelperSK34N09/05/20242adultvc57_irecords_extract
BelperSK34N07/05/20241adultvc57_irecords_extract
BelperSK34N06/05/20241adultvc57_irecords_extract
BelperSK34N02/05/20241adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G02/05/20244adultvc57_irecords_extract
Woodland AveSK43R11/08/20231adultvc57_irecords_extract
BelperSK34N22/05/20231adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G08/05/20233adultvc57_irecords_extract
Ferneydale AvenueSK07Q13/06/20211adultvc57_irecords_extract
Hardwick Hall NTSK46S16/05/20211adultvc57_irecords_extract
Woodland AveSK43R14/08/20201adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y14/07/20201Adultvc57_irecords_extract
Birch ValeSK08I07/05/20201adultvc57_irecords_extract
Forbes Hole LNRSK43W05/05/20201not recordedvc57_irecords_extract
Not givenSK21C03/07/20141Adultvc57_irecords_extract
Ladycroft Ave,BuxtonSK07S06/05/20111Adultvc57_danes_bc_data
Midway, Derbys.SK32A05/09/20091adultvc57_irecords_extract
Midway Rd,Midway,SwadlincoteSK32A05/09/20091Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y21/05/20041Adultvc57_irecords_extract
Acton Rd Ind Est, Long EatonSK43W19/07/19951Adultvc57_danes_bc_data

Epinotia mercuriana       Epinotia nanana

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