Cnephasia incertana       Cnephasia asseclana
49.050 BF1020  –  Tortricidae –  Tortricinae – Cnephasia stephensiana – Common Grey Tortrix – Doubleday, 1849) Adult Micro:  CAT 4 – Gen. Det. Required – Gen-Det-Reqd       Leaf-miner:  CAT L – The leaf or a Photo required – reared and possibly dissected       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Blue –  Generally Common / Widespread        purple – Leaf Miner
Taxonomy:   Micro   >>  Tortricidae  >> Tortricinae
Other Name/s: Grey Tortrix
ID Difficulty:  Red – difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required.
Confusion Species: Cnephasia asseclana (Flax Tortrix); Cnephasia incertana (Light Grey Tortrix); Eana incanana (Bluebell Moth)
ID pointers: Although the largest, it can be confused with other Cnephasia – Has a dark ground colour and dark grey fascia. The large size alone cannot enable it to be identified. Please record as Cnephasia agg. or determine by Gen. Det.
Distribution:  A widespread and common species but due to similarities with other Cnephasia species it requires a Gen Det and so this may be a reason for accurate status. One 100% record from 10th July 2022 – Hathersage – Gen Det completed.
Flight Period: July /  August /  –  One generation July – August Mine Period: January /  February /  March /  April /  May /  September /  October /  November /  December /   – The larvae mine the leaves of a huge variety of herbaceous plants Moth Activity: Crepuscular   – active from dusk and attracted to light Photographed: Yes –  Photographed By: The late Claire Miles (Gen Det)  © All Rights Reserved
*** Last updated on 7 May 2025 by RP ***
Wingspan: 18-22mm
 Food Plant: A huge variety of herbaceous plants
Recorded dates for Common [Blue code Blue-coded] moths are not stored on the website at this current time.
IMAGES BELOW:  

Hathersahe (2022) The late Claire Miles©

Cnephasia stephensiana - 10th July 2022 - Hathersage - The late Claire Miles
Cnephasia stephensiana – 10th July 2022 – Hathersage – The late Claire Miles
Cnephasia stephensiana - 10th July 2022 - Hathersage - The late Claire Miles - Gen Det
Cnephasia stephensiana – 10th July 2022 – Hathersage – The late Claire Miles – Gen Det
Cnephasia stephensiana - 10th July 2022 - Hathersage - The late Claire Miles
Cnephasia stephensiana - 10th July 2022 - Hathersage - The late Claire Miles - Gen Det

no images were found

Distribution Map for Cnephasia stephensiana

Found 86 records
    ↳ 1 from After 2025
    ↳ 5 from 2020 - 2024
    ↳ 80 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 – Cnephasia stephensiana

⚠️ 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: Cnephasia stephensiana
( data includes both Larvae and Adult Stages )

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


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


CUSUM Analysis: Cnephasia stephensiana
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 10 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 2005, reaching above average levels. The lowest population point occurred near 2002, 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: Cnephasia stephensiana
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Cnephasia stephensiana
( 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
Cnephasia stephensiana
( 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 - Cnephasia stephensiana – 86 records available

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

TaxonSite NameTetradYearDateCountStageSource
Cnephasia stephensianaMidway, Derbys.SK32A202519/06/20251adultvc57_irecords_extract
Cnephasia stephensianaFindern, Derbyshire, DEAZSK33A202411/06/20241adultvc57_irecords_extract
Cnephasia stephensianaHathersage, Derbyshire, UKSK28F202210/07/20221adultvc57_irecords_extract
Cnephasia stephensianaHavercroft RoadSK38L202218/06/20221Adultvc57_irecords_extract
Cnephasia stephensianaHavercroft RoadSK38L202101/08/20211Adultvc57_irecords_extract
Cnephasia stephensianaMidway, Derbys.SK32A202115/07/20211adultvc57_irecords_extract
Cnephasia stephensianaPleasley Pit CP, PleasleySK46X201921/07/20191AdultDanes_2019-2021
Cnephasia stephensianaPleasley Pit CP, PleasleySK46X201905/07/20191AdultDanes_2019-2021
Cnephasia stephensianaThe Old Manse, Ault Hucknall, GlapwellSK46S201320/07/20131Adultvc57_danes_bc_data
Cnephasia stephensianaThe Old Manse, Ault Hucknall, GlapwellSK46S201319/07/20132Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201208/08/20122Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201205/08/20121Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201215/08/20121Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201203/08/20121Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201210/08/20122Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201218/08/20121Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201225/07/20121Adultvc57_danes_bc_data
Cnephasia stephensianaChaddesden Wood, Chaddesden, DerbySK33Z201227/07/20122Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201226/07/20122Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201224/07/20123Adultvc57_danes_bc_data
Cnephasia stephensianaMidway Rd,Midway,SwadlincoteSK32A201227/07/20121Adultvc57_danes_bc_data
Cnephasia stephensianaMelbourne, DerbyshireSK32X201127/07/20111adultvc57_irecords_extract
Cnephasia stephensianaSpinney Hill,MelbourneSK32X201128/07/20111Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201001/08/20101Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201007/08/20101Adultvc57_danes_bc_data
Cnephasia stephensianaMelbourne, DerbyshireSK32X201008/07/20101adultvc57_irecords_extract
Cnephasia stephensianaAult Hucknall,GlapwellSK46S201011/07/20101Adultvc57_danes_bc_data
Cnephasia stephensianaRose Av,ClowneSK57D201024/07/20101Adultvc57_danes_bc_data
Cnephasia stephensianaBiggin Dale, nr HartingtonSK15P201028/07/20101Adultvc57_danes_bc_data
Cnephasia stephensianaMidway, Derbys.SK32A200925/07/20091adultvc57_irecords_extract
Cnephasia stephensianaWood Lane,Newhall,SwadlincoteSK22V200924/07/20091Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S200910/07/20091Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S200901/07/20093Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S200903/07/20091Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S200924/07/20091Adultvc57_danes_bc_data
Cnephasia stephensianaMidway Rd,Midway,SwadlincoteSK32A200925/07/20091Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S200930/06/20093Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S200927/06/20091Adultvc57_danes_bc_data
Cnephasia stephensianaFar Cross,Cavendish Park,MatlockSK36A200928/06/20091Adultvc57_danes_bc_data
Cnephasia stephensianaAult Hucknall,GlapwellSK46S200929/06/20091Adultvc57_danes_bc_data
Cnephasia stephensianaBristol Rd,IlkestonSK44R200805/08/20081Adultvc57_danes_bc_data
Cnephasia stephensianaMelbourne, DerbyshireSK32X200825/07/20081adultvc57_irecords_extract
Cnephasia stephensianaSpinney Hill,MelbourneSK32X200825/07/20081Adultvc57_danes_bc_data
Cnephasia stephensianaBristol Rd,IlkestonSK44R200815/07/20081Adultvc57_danes_bc_data
Cnephasia stephensianaMidway Rd,Midway,SwadlincoteSK32A200812/07/20081Adultvc57_danes_bc_data
Cnephasia stephensianaMidway Rd,Midway,SwadlincoteSK32A200819/07/20081Adultvc57_danes_bc_data
Cnephasia stephensianaBristol Rd,IlkestonSK44R200821/07/20081Adultvc57_danes_bc_data
Cnephasia stephensianaMelbourne, DerbyshireSK32X200722/07/20071adultvc57_irecords_extract
Cnephasia stephensianaSpinney Hill,MelbourneSK32X200722/07/20071Adultvc57_danes_bc_data
Cnephasia stephensianaMelbourne, DerbyshireSK32X200614/07/20062adultvc57_irecords_extract
Cnephasia stephensianaSpinney Hill,MelbourneSK32X200607/07/20061Adultvc57_danes_bc_data
Cnephasia stephensianaSpinney Hill,MelbourneSK32X200614/07/20061Adultvc57_danes_bc_data
Cnephasia stephensianaSpinney Hill,MelbourneSK32X200621/07/20061Adultvc57_danes_bc_data
Cnephasia stephensianaMelbourne, DerbyshireSK32X200621/06/20061adultvc57_irecords_extract
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200511/07/200510Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200513/07/20053Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200521/07/20052Adultvc57_danes_bc_data
Cnephasia stephensianaSpinney Hill,MelbourneSK32X200522/07/20051Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200501/07/20057Adultvc57_danes_bc_data
Cnephasia stephensianaSpinney Hill,MelbourneSK32X200508/07/20053Adultvc57_danes_bc_data
Cnephasia stephensianaForemark Resr, TicknallSK32H200509/07/20055Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200526/07/20051Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200527/06/20052Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200406/08/20041Adultvc57_danes_bc_data
Cnephasia stephensianaMelbourne, DerbyshireSK32X200413/07/20041adultvc57_irecords_extract
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200417/07/20042Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200425/07/20041Adultvc57_danes_bc_data
Cnephasia stephensianaSpinney Hill,MelbourneSK32X200411/07/20043Adultvc57_danes_bc_data
Cnephasia stephensianaSpinney Hill,MelbourneSK32X200415/07/20043Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200419/07/20046Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200409/07/20041Adultvc57_danes_bc_data
Cnephasia stephensianaEdgecote Drive,Newhall,SwadlincoteSK22V200410/07/20041Adultvc57_danes_bc_data
Cnephasia stephensianaSpinney Hill,MelbourneSK32X200413/07/20041Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200413/07/20043Adultvc57_danes_bc_data
Cnephasia stephensianaMidway Rd,Midway,SwadlincoteSK32A200414/07/20041Adultvc57_danes_bc_data
Cnephasia stephensianaMidway Rd,Midway,SwadlincoteSK32A200416/07/20042Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200416/07/20042Adultvc57_danes_bc_data
Cnephasia stephensianaEdgecote Drive,Newhall,SwadlincoteSK22V200419/07/20041Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200422/07/20041Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200427/07/20044Adultvc57_danes_bc_data
Cnephasia stephensianaEdgecote Drive,Newhall,SwadlincoteSK22V200429/07/20043Adultvc57_danes_bc_data
Cnephasia stephensianaEdgecote Drive,Newhall,SwadlincoteSK22V200416/06/20041Adultvc57_danes_bc_data
Cnephasia stephensianaMain St,Kings Newton,MelbourneSK32Y200430/06/20041Adultvc57_danes_bc_data
Cnephasia stephensianaWood Lane,Newhall,SwadlincoteSK22V200203/06/20021Adultvc57_danes_bc_data
Cnephasia stephensianaKnighton St, Hepthorne Lane, North WingfieldSK46C198214/07/19822Adultvc57_danes_bc_data
Cnephasia stephensianaKnighton St, Hepthorne Lane, North WingfieldSK46C198215/07/19825Adultvc57_danes_bc_data

Cnephasia incertana       Cnephasia asseclana

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