Winter Moth       November Moth agg
70.107 BF1795  –  Geometridae –  Larentiinae – Epirrita dilutata – November Moth – (Denis & Schiffermüller, 1775) Adult Macro:  CAT 4 – Dissection required – Dissection required       PDF Icon – click for Adult Macro Verification Guidelines
Blue –  Generally Common / Widespread   
Taxonomy:   Macro   >>  Geometridae  >> Larentiinae
ID Difficulty:  Red – difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required.
Confusion Species: Pale November Moth, Autumnal Moth
ID pointers: See Detailed document by Christian Heintzen here Identifying Epiritas by octavals and wing patterning The four species of Epirrita moth are notoriously difficult to ID in the field. Best to follow the information contained in the ID Guides. In some cases the moths genitalia needs to be inspected. However in fresh clearly marked (dilutata) individuals, the post-median line touches or bends towards the small black discal spot if present. In the Pale November Moth (christyi) the black discal spot is isolated.
Distribution:  A resident that is common and well distributed throughout the county. Can be very common locally.
General Comment: None Flight Period: September /  October /  November –  On the wing between September – November. Moth Activity: Nocturnal   – and is attracted to light Photographed: Yes –  Photographed By: Christian Heintzen  © All Rights Reserved
*** Last updated on 23 October 2025 by RP ***
Wingspan: 38-44mm
Forewing: 15-20mm Food Plant: Broadleaved trees.
Recorded dates for Common [Blue code Blue-coded] moths are not stored on the website at this current time.
Selected Images:  Christian Heintzen has kindly provided me with his fabulous plates, for which I’m very grateful,  on identifying November Moth and Autumnal Moth by wing phenotype, octavals and flight season  -Christian Heintzen©

November Moth - Geometridae - Epirrita dilutata - Christian Heintzen
November Moth – Geometridae – Epirrita dilutata – Christian Heintzen
November Moth - Geometridae - Epirrita dilutata - Christian Heintzen
November Moth – Geometridae – Epirrita dilutata – Christian Heintzen
November Moth - Confirmed by examination of octvals - Christian Heintzen - 19/10/2025
November Moth – Confirmed by examination of octvals – Christian Heintzen – 19/10/2025
November Moth - Geometridae - Epirrita dilutata - Christian Heintzen
November Moth - Geometridae - Epirrita dilutata - Christian Heintzen
November Moth - Confirmed by examination of octvals - Christian Heintzen - 19/10/2025


Image Gallery

November Moth - Melbourne - Tony Davison© November Moth - Melbourne - Tony Davison© November Moth - Melbourne - Tony Davison©

Distribution Map for Epirrita dilutata

Found 142 records
    ↳ 0 from After 2025
    ↳ 42 from 2020 - 2024
    ↳ 100 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 – Epirrita dilutata

⚠️ 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: Epirrita dilutata
( data includes both Larvae and Adult Stages )

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


First/Last Recorded Dates: Epirrita dilutata
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: Epirrita dilutata
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Epirrita dilutata
AGR: 4.17%   |   Total % Change: 135.7%


CUSUM Analysis: Epirrita dilutata
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 12 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 2007, reaching above average levels. The lowest population point occurred near 2004, 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: Epirrita dilutata
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Epirrita dilutata
( 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 - Epirrita dilutata – 142 records available

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

Site NameTetradDateCountStageSource
Glossop, Hague Street, Hay meadowSK09G07/11/20241adultvc57_irecords_extract
Glossop, Hague Street, Hay meadowSK09G05/11/20243adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A03/11/20241adultvc57_irecords_extract
Glossop, Gnat Hole Rough FieldsSK09L02/11/20242adultvc57_irecords_extract
Glossop, Hague Street, Hay meadowSK09G02/11/20241adultvc57_irecords_extract
Longdendale, Wildboar Clough WoodlandSK09U01/11/20241adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G31/10/20241adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A25/10/20244adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A24/10/20243adultvc57_irecords_extract
Glossop, Gnat Hole Rough FieldsSK09L14/10/20248adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G13/10/20247adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G11/10/20247adultvc57_irecords_extract
Glossop, Gnat Hole Rough FieldsSK09L11/10/20241adultvc57_irecords_extract
Glossop, Hague Street, Hay meadowSK09G08/10/202415adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G08/11/20231adultvc57_irecords_extract
Glossop, Shawmoor PlantationSK09F28/10/20231adultvc57_irecords_extract
Glossop, Gnat Hole Rough FieldsSK09L16/10/202323adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G15/10/20236adultvc57_irecords_extract
Longdendale, Wildboar CloughSK09U07/10/202327adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G06/10/202335adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G04/10/20237adultvc57_irecords_extract
Glossop, Shawmoor PlantationSK09F01/10/20232adultvc57_irecords_extract
Glossop, The TwitchlingsSK09K29/09/20231adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G27/09/20231adultvc57_irecords_extract
Glossop, The TwitchlingsSK09K05/11/20221adultvc57_irecords_extract
Glossop, Shawmoor PlantationSK09F04/11/20221adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G31/10/20226adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G18/10/202215adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G16/10/20227adultvc57_irecords_extract
Glossop, Gnat Hole Rough FieldsSK09L15/10/20225adultvc57_irecords_extract
Glossop, The TwitchlingsSK09K14/10/20224adultvc57_irecords_extract
Longdendale, Wildboar CloughSK09U13/10/202216adultvc57_irecords_extract
Glossop, Hague StreetSK09G12/10/20222adultvc57_irecords_extract
Glossop, Hague Street, Hay meadowSK09G11/10/20222adultvc57_irecords_extract
Glossop, Shawmoor PlantationSK09F10/10/202215adultvc57_irecords_extract
Glossop, Hague Street, Hay meadowSK09G08/10/20221adultvc57_irecords_extract
Glossop, Hague Street, Hay meadowSK09G07/10/20224adultvc57_irecords_extract
Glossop, Hague Street, Hay meadowSK09G05/10/20221adultvc57_irecords_extract
Glossop, Hague Street, Hay meadowSK09G28/09/20222adultvc57_irecords_extract
Marlborough Road, Long Eaton, DerbysSK43X31/10/20202adultvc57_irecords_extract
Marlborough Road, Long Eaton, DerbysSK43X23/10/20204adultvc57_irecords_extract
Kirk Hallam, IlkestonSK44K21/10/20201adultvc57_irecords_extract
Hathersage, Derbyshire, UKSK28F17/10/20192adultvc57_irecords_extract
Marlborough Road, Long EatonSK43X17/10/20182not recordedvc57_irecords_extract
Forbes HoleSK43W13/10/20174adultvc57_irecords_extract
Millennium Meadow NR, DuffieldSK34L29/04/20141Larvaevc57_danes_bc_data
Oaks Barn Cottage, Monyash Rd, Over Haddon, BakewellSK26D09/10/20111Adultvc57_danes_bc_data
Oaks Barn Cottage, Monyash Rd, Over Haddon, BakewellSK26D11/10/20101Adultvc57_danes_bc_data
Oaks Barn Cottage, Monyash Rd, Over Haddon, BakewellSK26D08/10/20102Adultvc57_danes_bc_data
Oaks Barn Cottage, Monyash Rd, Over Haddon, BakewellSK26D21/10/20094Adultvc57_danes_bc_data
Oaks Barn Cottage, Monyash Rd, Over Haddon, BakewellSK26D15/10/20092Adultvc57_danes_bc_data
Dovedale (entrance cattle grid), AshbourneSK15K31/10/20071Adultvc57_danes_bc_data
Wilmot St,Long EatonSK43R13/10/20071Adultvc57_danes_bc_data
Osmaston Park,AshbourneSK24B13/10/200728Adultvc57_danes_bc_data
Edgecote Drive,Newhall,SwadlincoteSK22V09/10/20061Adultvc57_danes_bc_data
Miller's DaleSK17L23/09/20061Adultvc57_danes_bc_data
Bretby Park (The Gorse), SwadlincoteSK22W14/10/200540Adultvc57_danes_bc_data
Calke Park (Lime Tree Ave), TicknallSK32L08/10/20056Adultvc57_danes_bc_data
Pleasley Park (centre clearing)SK56H04/10/20057Adultvc57_danes_bc_data
Foremark Resr, TicknallSK32H06/11/20041Adultvc57_danes_bc_data
Edgecote Drive,Newhall,SwadlincoteSK22V31/10/20041Adultvc57_danes_bc_data
Edgecote Drive,Newhall,SwadlincoteSK22V19/10/20041Adultvc57_danes_bc_data
Edgecote Drive,Newhall,SwadlincoteSK22V09/10/20042Adultvc57_danes_bc_data
Foremark Resr, TicknallSK32H18/11/20031Adultvc57_danes_bc_data
Repton Shrubs, ReptonSK32B05/11/20032Adultvc57_danes_bc_data
Repton Shrubs, ReptonSK32B05/11/20032Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M24/10/19962Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M24/10/19962Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M17/10/19962Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M17/10/19962Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M10/10/19962Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M10/10/19962Adultvc57_danes_bc_data
Deerlands Rd, Ashgate, ChesterfieldSK37K14/10/19951Adultvc57_danes_bc_data
Deerlands Rd, Ashgate, ChesterfieldSK37K14/10/19951Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F26/10/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F26/10/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F18/10/19852Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F18/10/19852Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F16/10/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F16/10/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F15/10/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F15/10/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F14/10/19852Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F14/10/19852Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F13/10/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F13/10/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F10/10/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F10/10/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F09/10/19852Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F09/10/19852Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F28/10/19841Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F28/10/19841Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F11/10/19842Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F11/10/19842Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F08/10/19841Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F08/10/19841Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A09/11/19831Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A01/11/19831Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A02/10/19831Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A29/09/19831Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F11/10/19822Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F11/10/19822Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F23/10/19811Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F23/10/19811Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A21/10/19811Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A18/10/19811Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F14/10/19811Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F14/10/19811Adultvc57_danes_bc_data
Drummond Rd, IlkestonSK44R06/10/19811Adultvc57_danes_bc_data
Drummond Rd, IlkestonSK44R01/10/19811Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X21/10/19803Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X15/10/19802Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X14/10/19807Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X13/10/19802Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X10/10/19801Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X05/10/19802Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X04/10/19804Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X03/10/19806Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X02/10/19806Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A02/10/19801Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X01/10/19802Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X30/09/19806Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X27/09/19804Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X26/09/19801Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X25/09/19801Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A25/09/19801Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X24/09/19802Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X23/09/19801Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X22/09/19801Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X20/09/19802Adultvc57_danes_bc_data
Clough Wood,Darley DaleSK26K01/05/19801Adultvc57_danes_bc_data
Newbold Ave, ChesterfieldSK37R20/09/19701Adultvc57_danes_bc_data
Newbold Drive, ChesterfieldSK37R07/10/19691Adultvc57_danes_bc_data
Newbold Drive, ChesterfieldSK37R06/10/19681Adultvc57_danes_bc_data
Newbold Rd, ChesterfieldSK37R09/10/19621Adultvc57_danes_bc_data
Newbold Rd, ChesterfieldSK37R01/10/19621Adultvc57_danes_bc_data
Newbold Rd, ChesterfieldSK37R22/09/19621Adultvc57_danes_bc_data
Newbold Ave, ChesterfieldSK37R21/11/19591Adultvc57_danes_bc_data
Newbold Ave, ChesterfieldSK37R01/11/19581Adultvc57_danes_bc_data
Newbold Ave, ChesterfieldSK37R03/10/19583Adultvc57_danes_bc_data
Newbold Ave, ChesterfieldSK37R02/10/19583Adultvc57_danes_bc_data
Newbold Ave, ChesterfieldSK37R01/10/19584Adultvc57_danes_bc_data

Winter Moth       November Moth agg

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