49.051 BF1021 – Flax Tortrix – Cnephasia asseclana – ([Denis & Schiffermüller], 1775)
Adult Micro: CAT 4 – Dissection required – 
Leaf-miner: CAT L – The leaf or a Photo required – 
Larval Case: C1 – Distinctive Species –
– click for General Verification Guidelines | – click for Specific Verification Guidelines
Leaf-miner: CAT L – The leaf or a Photo required – Larval Case: C1 – Distinctive Species – – click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Generally Common / Widespread 
– Leaf-miner
– care required in the identification process, as confusion with similar species is likely – quality photographs required. Confusion Species: other Cnephasia
ID pointers: The ID of Graham’s specimen was determined by Gen.Det but no prep photos were taken. Variable in markings, this particular one shows overall brown forewings covered in spots and blotches. Can show variegated cross-bands over a paler brown background. A Gen Det prep photo by the late Claire Miles is of one taken on 7th June 2022.
Distribution: A reasonably common species found in gardens, farmland and other open spaces, but due to the difficulty of identification, records remain low. Can be confused with other Cnephasia. If uncertain please record as Cnephasia agg
General Comment: None Mine Period Additional: Considered a Leaf miner as the larvae initially mine the leaves of its host plants. Then later spinning the leaves or flowers together for pupation.
Mine ID Difficulty: Not Recorded
Mine Type/s: Not Recorded
Mine Feeding Method/s: Not Recorded
Mine Comment: None.
*** Last updated on 26 October 2025 by TD ***
Blue-coded] moths is not displayed/updated in this tab. However, all verified records for this moth are listed in the RECORDS tab below. Selected Images: Grange Wood, Derbyshire – Graham Finch©
Image Gallery
No gallery images found for this moth.
Temporal Distribution Chart
Adults: (between 1997 - 2025)
(click legend below to show/hide datasets)
Distribution Map for Cnephasia asseclana
Found 19 records
↳ from 2026+
↳ 4 from 2020 - 2025
↳ 15 from Before 2020
↳ from 2026+
↳ 4 from 2020 - 2025
↳ 15 from Before 2020
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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 – Cnephasia asseclana
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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.
Monthly Records By Year:
Cnephasia asseclana
( data includes both Larvae and Adult Stages )
Monthly Counts By Year:
Cnephasia asseclana
( data is based on 'Adult' stage records only )
First/Last Recorded Dates: Cnephasia asseclana
Adult-only & Anything [Larvae, Pupae, Adult, Mines]
Shading shows moth presence between dates
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Recordings By Year: Cnephasia asseclana
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Cnephasia asseclana
AGR: 0% | Total % Change: 0%
Hectad (10kmx10km) Coverage: Cnephasia asseclana
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Cnephasia asseclana
Cnephasia asseclana
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 2020-2026.
Mine Periods – Indicative –vs– Recorded Data
Cnephasia asseclana
Cnephasia asseclana
( 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 2020-2026.
Records Behind the Map and Charts - Cnephasia asseclana – 19 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Recorder | Source | RecordKey |
|---|---|---|---|---|---|---|---|
| Shaw Farm, New Mills VC | SJ98Y | 12/08/2025 | 1 | adult | Hind, Steve | vc57_irecords_extract | iBRC44526617 |
| Ingleby Ave, Derby | SK33L | 20/06/2025 | 1 | adult | Shervill, Andrew | vc57_irecords_extract | iBRC42536159 |
| Hathersage, Derbyshire, UK | SK28F | 07/06/2022 | 1 | adult | Miles, Claire | vc57_irecords_extract | iBRC29213188 |
| Grange Wood, Overseal | SK21S | 02/07/2021 | 1 | adult | Graham Finch | vc57_irecords_extract | iBRC46107207 |
| Midway Rd,Midway,Swadlincote | SK32A | 13/07/2013 | 1 | Adult | M.J. Williams | vc57_danes_bc_data | LC000334001CP905 |
| Rosliston (National Forest Centre), Swadlincote | SK21N | 20/07/2012 | 6 | Adult | BUDWORTH, Mr D., CLARKE, Mr D.A., WARD, Mr N.J., S | vc57_danes_bc_data | LC000334001CP0DC |
| Bamford St,Ripley | SK34Z | 15/07/2012 | 1 | Adult | Thorpe, Steve | vc57_danes_bc_data | LC000334001COY6K |
| Bamford St,Ripley | SK34Z | 19/06/2012 | 1 | Adult | Thorpe, Steve | vc57_danes_bc_data | LC000334001COU9L |
| Bamford St,Ripley | SK34Z | 17/06/2012 | 1 | Adult | Thorpe, Steve | vc57_danes_bc_data | LC000334001CP7SP |
| Denefields,Matlock | SK36A | 22/07/2010 | 1 | Adult | Dave Budworth;N.J. Ward | vc57_danes_bc_data | LC000334001COX9U |
| Newboundmill Lane,Pleasley | SK56C | 13/06/2009 | 1 | Adult | B. Elliott;C. Stubbs | vc57_danes_bc_data | LC000334001COSQF |
| Drakelow NR (car park),Burton on Trent | SK22F | 12/07/2008 | 1 | Adult | M.J. Williams;R. Williams | vc57_danes_bc_data | LC000334001COSJP |
| Drakelow NR (car park),Burton on Trent | SK22F | 28/06/2008 | 1 | Adult | M.J. Williams;R. Williams | vc57_danes_bc_data | LC000334001CP49D |
| Carvers Rocks,Hartshorne,Swadlincote (old toilet block area) | SK32G | 11/08/2007 | 6 | Adult | A. Davison;K. Peach;N. Topliss | vc57_danes_bc_data | LC000334001COWFI |
| Main St,Kings Newton,Melbourne | SK32Y | 13/07/2005 | 1 | Adult | Soar, Will | vc57_danes_bc_data | LC000334001COVUA |
| Foremark Resr, Ticknall | SK32H | 09/07/2005 | 6 | Adult | A. Davison;N. Topliss;W. Soar | vc57_danes_bc_data | LC000334001CP2MD |
| Shipley Park (Cinder Hill), Shipley, Ilkeston | SK44H | 02/07/2005 | 1 | Adult | Dave Budworth;B.G. Sewell;T. Duro | vc57_danes_bc_data | LC000334001COVTN |
| Edgecote Drive,Newhall,Swadlincote | SK22V | 03/07/2004 | 1 | Adult | Topliss, Neil | vc57_danes_bc_data | LC000334001CP1VG |
| Dowey Lumb NR, Dronfield | SK38Q | 25/07/1997 | 1 | Adult | H.E. Beaumont;R.F. Botterill | vc57_danes_bc_data | LC000334001COQXW |