70.236 BF1915 – September Thorn – Ennomos erosaria – ([Denis & Schiffermüller], 1775)
Adult Macro: CAT 2 – Can be confused with other species – Good photographs may be required – 
– click for Adult Macro Verification Guidelines
– click for Adult Macro Verification Guidelines
– Rare / Uncommon / Scarce
– care required in the identification process, as confusion with similar species is likely – quality photographs required. ID pointers: Although similar to a few other species of “Thorns”, this one is generally plainer in appearance. September Thorn has orange “Leg Socks” – August Thorn has white “Leg Socks”.
Distribution: (Last record: 29 July 2025 at Mickleover ) – A resident that is locally distributed and uncommon in Derbyshire. Most records come from the south and east of the county. Easily confused with the rarer August Thorn.
General Comment: None *** Last updated on 11 March 2026 by TD ***
Forewing: 17-21mm
Last Recorded Year: 2025
Last Recorded By – Christine Maughan
Last Recorded General Area – Mickleover
Selected Images: Allestree, Derby August 2021 – image by Stephen Plant © / Chaddesden, Derby – August 2024 – Martin Roome © / Charlesworth – September 2024 – Christian Heintzen©/ Findern 29/6/2025 – Brian Hallam© / Mickleover ( 2025) Christine Maughan©
Image Gallery
Temporal Distribution Chart
Adults: (between 1959 - 2025)
(click legend below to show/hide datasets)
This chart summarises all available historical occurrence records collated by ISO week of the year. It reflects recorder effort and sampling distribution as well as true biological activity, and should be interpreted as an indicative pattern of seasonal occurrence rather than a statistically controlled abundance or phenology model.
Distribution Map for Ennomos erosaria
Found 118 records
↳ from 2026+
↳ 65 from 2020 - 2025
↳ 53 from Before 2020
↳ from 2026+
↳ 65 from 2020 - 2025
↳ 53 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.
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 – Ennomos erosaria
⚠️ 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.
Monthly Records By Year:
Ennomos erosaria
( data includes both Larvae and Adult Stages )
Monthly Counts By Year:
Ennomos erosaria
( data is based on 'Adult' stage records only )
First/Last Recorded Dates: Ennomos erosaria
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: Ennomos erosaria
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Ennomos erosaria
AGR: 1.44% | Total % Change: 31.3%
Hectad (10kmx10km) Coverage: Ennomos erosaria
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Ennomos erosaria
Ennomos erosaria
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.
Records Behind the Map and Charts - Ennomos erosaria – 118 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Recorder | Source | RecordKey |
|---|---|---|---|---|---|---|---|
| Walton Chesterfield | SK36U | 23/08/2025 | 1 | adult | Palethorpe, Amanda | vc57_irecords_extract | iBRC44754000 |
| Findern, Derbyshire | SK33A | 15/08/2025 | 1 | adult | Hallam, Brian | vc57_irecords_extract | iBRC44527438 |
| Mellor | SJ98Z | 14/08/2025 | 1 | adult | Knass, David | vc57_irecords_extract | iBRC44560771 |
| Shaw Farm, New Mills VC | SJ98Y | 12/08/2025 | 2 | adult | Hind, Steve | vc57_irecords_extract | iBRC44526588 |
| Mickleover garden | SK33C | 11/08/2025 | 1 | adult | Maughan, Christine | vc57_irecords_extract | iBRC45153211 |
| Glossop SK, UK | SK09C | 07/08/2025 | 1 | Adult | Lees, Alexander | vc57_irecords_extract | iBRC44226326 |
| Glossop SK, UK | SK09C | 07/08/2025 | 1 | Adult | Lees, Alexander | vc57_irecords_extract | iBRC44226332 |
| Dinting Nature Reserve | SK09C | 06/08/2025 | 5 | adult | Christian Heintzen, David Walsh, Bill Underwood, Alex Lees | vc57_irecords_extract | iBRC44291308 |
| Findern, Derbyshire | SK33A | 03/08/2025 | 1 | adult | Hallam, Brian | vc57_irecords_extract | iBRC44180559 |
| Mickleover garden | SK33C | 29/07/2025 | 1 | adult | Maughan, Christine | vc57_irecords_extract | iBRC45112365 |
| Mellor | SJ98Z | 17/07/2025 | 1 | adult | Knass, David | vc57_irecords_extract | iBRC43588455 |
| Mellor | SJ98Z | 16/07/2025 | 1 | adult | Knass, David | vc57_irecords_extract | iBRC43588080 |
| Littleover | SK33G | 12/07/2025 | 1 | adult | Watson, Adrian | vc57_irecords_extract | iBRC43604366 |
| Chaddesden, Derby | SK33T | 11/07/2025 | 1 | adult | roome, martin | vc57_irecords_extract | iBRC44160176 |
| Derby DE | SK33I | 05/07/2025 | 1 | adult | Watson, Adrian | vc57_irecords_extract | iBRC43623155 |
| Findern, Derbyshire | SK33A | 30/06/2025 | 1 | adult | Hallam, Brian | vc57_irecords_extract | iBRC42918839 |
| Mellor | SJ98Z | 14/09/2024 | 1 | adult | Knass, David | vc57_irecords_extract | iBRC38491134 |
| Findern, Derbyshire, DEAZ | SK33A | 06/09/2024 | 1 | adult | Hallam, Brian | vc57_irecords_extract | iBRC39935134 |
| Charlesworth, Cown Edge Landslide | SK09A | 02/09/2024 | 2 | adult | Heintzen, Christian | vc57_irecords_extract | iBRC38657876 |
| Park Haed, Crich | SK35M | 01/09/2024 | 2 | adult | Bradley, Jonathan | vc57_irecords_extract | iBRC38295021 |
| Findern, Derbyshire, DEAZ | SK33A | 27/08/2024 | 1 | adult | Hallam, Brian | vc57_irecords_extract | iBRC39935038 |
| Findern, Derbyshire, DEAZ | SK33A | 23/08/2024 | 1 | adult | Hallam, Brian | vc57_irecords_extract | iBRC39934974 |
| Ilkeston, Derbyshire | SK44K | 17/08/2024 | 1 | adult | Hobby, Brian | vc57_irecords_extract | iBRC38196754 |
| Chaddesden, Derby | SK33T | 12/08/2024 | 2 | adult | roome, martin | vc57_irecords_extract | iBRC38337782 |
| Mickleover garden | SK33C | 11/08/2024 | 1 | adult | Maughan, Christine | vc57_irecords_extract | iBRC38012440 |
| Sandiacre | SK43S | 09/08/2024 | 1 | adult | paul buxton | vc57_irecords_extract | iBRC37850691 |
| Findern, Derbyshire, DEAZ | SK33A | 05/08/2024 | 1 | adult | Hallam, Brian | vc57_irecords_extract | iBRC39934838 |
| Midway, Derbys. | SK32A | 03/08/2024 | 1 | adult | Williams, Michael | vc57_irecords_extract | iBRC39954697 |
| Ilkeston, Derbyshire | SK44K | 02/08/2024 | 1 | adult | Hobby, Brian | vc57_irecords_extract | iBRC37879092 |
| Chaddesden, Derby | SK33T | 31/07/2024 | 1 | adult | roome, martin | vc57_irecords_extract | iBRC38327901 |
| Belper | SK34N | 29/07/2024 | 1 | adult | Evans, Dave | vc57_irecords_extract | iBRC37495000 |
| Allestree, Derby | SK33P | 21/07/2024 | 1 | adult | Plant, Stephen | vc57_irecords_extract | iBRC37229622 |
| Allestree, Derby | SK33P | 21/07/2024 | 1 | adult | Plant, Stephen | vc57_irecords_extract | iBRC40176486 |
| Ilkeston, Derbyshire | SK44K | 19/07/2024 | 1 | adult | Hobby, Brian | vc57_irecords_extract | iBRC37608052 |
| Allestree, Derby, Elm Grove | SK34K | 15/09/2023 | 1 | adult | Grange, William | vc57_irecords_extract | iBRC36502332 |
| Garden, Walton | SK36U | 09/09/2023 | 1 | adult | Palethorpe, Amanda | vc57_irecords_extract | iBRC46020504 |
| Park Head, Crich | SK35M | 20/08/2023 | 1 | Adult | Bradley, Jonathan | vc57_irecords_extract | iBRC35418986 |
| Mellor | SJ98Z | 19/08/2023 | 1 | adult | Knass, David | vc57_irecords_extract | iBRC32552110 |
| Findern Garden | SK33A | 18/08/2023 | 1 | Adult | Hallam, Brian | vc57_irecords_extract | iBRC34638144 |
| Findern Garden | SK33A | 16/08/2023 | 4 | Adult | Hallam, Brian | vc57_irecords_extract | iBRC34638094 |
| Findern Garden | SK33A | 11/08/2023 | 2 | Adult | Hallam, Brian | vc57_irecords_extract | iBRC34638032 |
| Belper | SK34U | 10/08/2023 | 1 | adult | Evans, Dave | vc57_irecords_extract | iBRC35297163 |
| Findern Garden | SK33A | 31/07/2023 | 1 | Adult | Hallam, Brian | vc57_irecords_extract | iBRC34637896 |
| Findern Garden | SK33A | 28/07/2023 | 1 | Adult | Hallam, Brian | vc57_irecords_extract | iBRC34637858 |
| Findern, Derbyshire, DEAZ | SK33A | 14/08/2022 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35167622 |
| Kirk Hallam, Ilkeston | SK44K | 22/07/2022 | 1 | adult | Hobby, Brian | vc57_irecords_extract | iBRC41046036 |
| EA depot | SK43G | 19/07/2022 | 1 | adult | Collins, Stuart | vc57_irecords_extract | iBRC28766650 |
| Findern, Derbyshire, DEAZ | SK33A | 18/07/2022 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35167244 |
| Findern, Derbyshire, DEAZ | SK33A | 17/07/2022 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35167152 |
| Ninelands Road | SK28F | 16/09/2021 | 1 | adult | Blues, Clare | vc57_irecords_extract | iBRC27389868 |
| Birch Vale | SK08I | 05/09/2021 | 1 | Adult | Hewitt, Jane | vc57_irecords_extract | iBRC34472498 |
| Findern, Derbyshire, DEAZ | SK33A | 26/08/2021 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35165837 |
| Findern, Derbyshire, DEAZ | SK33A | 20/08/2021 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35165754 |
| Findern, Derbyshire, DEAZ | SK33A | 06/08/2021 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35165611 |
| Findern, Derbyshire, DEAZ | SK33A | 02/08/2021 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35165575 |
| Allestree, Derby | SK33P | 20/07/2021 | 1 | adult | Plant, Stephen | vc57_irecords_extract | iBRC46669895 |
| Longhurst Lane, Mellor | SJ98Z | 23/08/2020 | 1 | adult | KNASS, Mr D. | Danes_2019-2021 | 367 |
| Findern, Derbyshire, DEAZ | SK33A | 17/08/2020 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35163852 |
| Longhurst Lane, Mellor | SJ98Z | 14/08/2020 | 1 | adult | KNASS, Mr D. | Danes_2019-2021 | 383 |
| Findern, Derbyshire, DEAZ | SK33A | 11/08/2020 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35163721 |
| Findern, Derbyshire, DEAZ | SK33A | 10/08/2020 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35163664 |
| Brook Road, Thulston | SK43B | 09/08/2020 | 1 | adult | Bryce, Marion | vc57_irecords_extract | iBRC17299577 |
| Ninelands Road | SK28F | 07/08/2020 | 5 | adult | Blues, Clare | vc57_irecords_extract | iBRC27431253 |
| Findern, Derbyshire, DEAZ | SK33A | 30/07/2020 | 2 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35163425 |
| Longhurst Lane, Mellor | SJ98Z | 28/07/2020 | 1 | adult | KNASS, Mr D. | Danes_2019-2021 | 482 |
| Findern, Derbyshire, DEAZ | SK33A | 02/08/2019 | 2 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35161724 |
| Findern, Derbyshire, DEAZ | SK33A | 26/07/2019 | 1 | adult | Brian and Jean Hallam | vc57_irecords_extract | iBRC35161666 |
| Oaks Barn Cottage, Monyash Rd, Over Haddon, Bakewell | SK26D | 30/07/2011 | 1 | Adult | D.A. Clarke | vc57_danes_bc_data | LC000334001OK7B7 |
| Kedleston Park,Derby | SK34F | 11/08/2007 | 1 | Adult | I. Travers-Ayre;I.M. Viles | vc57_danes_bc_data | LC000334001OKICV |
| Church St,Holloway,Matlock | SK35I | 18/09/2006 | 1 | Adult | F. Harrison | vc57_danes_bc_data | LC000334001OI91W |
| Stocksmoor Farm, Ashover Rd, Old Tupton | SK36S | 19/08/1998 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OI3EY |
| Calke Park (Betty's Pool),Ticknall | SK32R | 10/08/1998 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OHNYK |
| South Wood, Calke, Ticknall | SK32R | 25/07/1997 | 1 | Adult | I. Travers-Ayre;I.M. Viles | vc57_danes_bc_data | LC000334001OJ0M5 |
| The Field,Shipley,Ilkeston | SK44M | 26/09/1996 | 1 | Adult | T. Duro | vc57_danes_bc_data | LC000334001OJ0D8 |
| The Field,Shipley,Ilkeston | SK44M | 26/09/1996 | 1 | Adult | T. Duro | vc57_danes_bc_data | LC000334001WPESP |
| Stevens Rd, Sandiacre | SK43T | 27/08/1996 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OI2TV |
| Stevens Rd, Sandiacre | SK43T | 19/08/1996 | 2 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OJ08L |
| Pond House, Mapperley Res, Ilkeston | SK44G | 10/09/1992 | 1 | Adult | T. Duro | vc57_danes_bc_data | LC000334001OIWOD |
| Pond House, Mapperley Res, Ilkeston | SK44G | 10/09/1992 | 1 | Adult | T. Duro | vc57_danes_bc_data | LC000334001WQAGH |
| Pond House, Mapperley Res, Ilkeston | SK44G | 13/08/1992 | 1 | Adult | T. Duro | vc57_danes_bc_data | LC000334001OHLS1 |
| Pond House, Mapperley Res, Ilkeston | SK44G | 13/08/1992 | 1 | Adult | T. Duro | vc57_danes_bc_data | LC000334001WOMVS |
| Pond House, Mapperley Res, Ilkeston | SK44G | 11/09/1990 | 2 | Adult | T. Duro | vc57_danes_bc_data | LC000334001OHL33 |
| Pond House, Mapperley Res, Ilkeston | SK44G | 11/09/1990 | 2 | Adult | T. Duro | vc57_danes_bc_data | LC000334001WOPTC |
| Pond House, Mapperley Res, Ilkeston | SK44G | 22/07/1989 | 1 | Adult | T. Duro | vc57_danes_bc_data | LC000334001OITUG |
| Pond House, Mapperley Res, Ilkeston | SK44G | 22/07/1989 | 1 | Adult | T. Duro | vc57_danes_bc_data | LC000334001WON7Q |
| Pond House, Mapperley Res, Ilkeston | SK44G | 19/08/1988 | 3 | Adult | T. Duro | vc57_danes_bc_data | LC000334001OI09A |
| Pond House, Mapperley Res, Ilkeston | SK44G | 19/08/1988 | 3 | Adult | T. Duro | vc57_danes_bc_data | LC000334001WOQCV |
| Pond House, Mapperley Res, Ilkeston | SK44G | 15/08/1986 | 2 | Adult | T. Duro | vc57_danes_bc_data | LC000334001OISD6 |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 11/09/1984 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OIR80 |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 11/09/1984 | 1 | Adult | R.H. Dumelow | vc57_danes_bc_data | LC000334001WOZQN |
| Shipley Wood, Shipley Park | SK44L | 17/08/1984 | 3 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OIR3E |
| Shipley Wood, Shipley Park | SK44L | 27/08/1982 | 1 | Adult | T. Duro | vc57_danes_bc_data | LC000334001OHI81 |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 22/08/1982 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OIAHQ |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 22/08/1982 | 1 | Adult | R.H. Dumelow | vc57_danes_bc_data | LC000334001WPUVE |
| Drummond Rd, Ilkeston | SK44R | 08/08/1982 | 2 | Adult | T. Duro | vc57_danes_bc_data | LC000334001OIAGQ |
| Shipley Wood, Shipley Park | SK44L | 06/08/1982 | 4 | Adult | T. Duro | vc57_danes_bc_data | LC000334001OHI6B |
| Shipley Wood, Shipley Park | SK44L | 30/07/1982 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OIP6X |
| Shipley Wood, Shipley Park | SK44L | 23/07/1982 | 2 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OHI33 |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 19/09/1981 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OHYE8 |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 19/09/1981 | 1 | Adult | R.H. Dumelow | vc57_danes_bc_data | LC000334001WOZL8 |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 16/09/1981 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OHYDZ |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 16/09/1981 | 1 | Adult | R.H. Dumelow | vc57_danes_bc_data | LC000334001WOZL2 |
| Askew Grove, Repton | SK32D | 26/08/1981 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OIA9O |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 18/09/1980 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OHH84 |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 18/09/1980 | 1 | Adult | R.H. Dumelow | vc57_danes_bc_data | LC000334001WP93J |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 18/09/1979 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OHGNR |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 18/09/1979 | 1 | Adult | A. Dick | vc57_danes_bc_data | LC000334001WPUO8 |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 14/09/1979 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OILZ8 |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 14/09/1979 | 1 | Adult | A. Dick | vc57_danes_bc_data | LC000334001WPUNS |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 31/08/1979 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OILXK |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 31/08/1979 | 1 | Adult | A. Dick | vc57_danes_bc_data | LC000334001WOPIX |
| Field Close, Hilton, Burton on Trent | SK23K | 24/08/1976 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OIK0U |
| Field Close, Hilton, Burton on Trent | SK23K | 20/08/1976 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OIK0K |
| Field Close, Hilton, Burton on Trent | SK23K | 18/08/1976 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OIJZN |
| Field Close, Hilton, Burton on Trent | SK23K | 12/08/1975 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OIJD4 |
| The Old Manse, Ault Hucknall, Glapwell | SK46S | 04/09/1968 | 1 | Adult | J.H. Johnson | vc57_danes_bc_data | LC000334001WPGE8 |
| Moorend, Beeley, Matlock | SK26T | 10/09/1959 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OHVNC |
| Moorend, Beeley | SK26T | 10/09/1959 | 1 | Adult | B.S. Fletcher | vc57_danes_bc_data | LC000334001WP9HC |