Flame Shoulder       Purple Clay
73.331 BF2121 - Barred Chestnut - Noctuidae - Diarsia dahlii
73.331 BF2121  – Barred Chestnut  – Diarsia dahlii  – (Hübner, 1813)
Adult Macro:  CAT 2 – Can be confused with other species – Good photographs maybe required – Can be confused with other species      
PDF Icon – click for Adult Macro Verification Guidelines
Green –  Rare / Uncommon / Scarce   
Taxonomy:   Macro  >>.  >>  Noctuidae  >> Noctuinae
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species:  Purple clay, Small Square-spot, Ingrailed Clay
ID pointers: See ID Guide below provided by Christian Heintzen©
Related Link  🔗 Diarsia ID Reference
Distribution:  (Last record: 25 July 2025 at Glossop )  –  Widely distributed across the upland moorland areas of North Derbyshire, but not in large numbers. The distribution seems to be concentrated around the central part of the county, with some records from further north (Buxton). 
General Comment: None Flight Period: July /  August /  September –  July – September Moth Activity: Nocturnal  Photographed: Yes –  Photographed By: Christian Heintzen  © All Rights Reserved
*** Last updated on 7 November 2025 by RP ***
Wingspan: 32-42mm
Forewing: 15-18mm Food Plant: Birch (Betula) and Bilberry (Vaccinium myrtillus).
Last Recorded Year: 2025
Last Recorded By – Christian Heintzen
Last Recorded General Area – Glossop
Selected Images:  ID guide kindly provided by Christian Heintzen ©  / Images  Glossop & Long Clough – Christian Heintzen© / Glossop (July 2025) Christian Heintzen©

Barred Chestnut - Christian Heintzen
Barred Chestnut – Christian Heintzen
Barred Chestnut - 23rd August 2024 - Long Clough - Christian Heintzen
Barred Chestnut – 23rd August 2024 – Long Clough – Christian Heintzen
Barred Chestnut - 1st September 2024 - Gnat Hole, Glossop -Christian Heintzen
Barred Chestnut – 1st September 2024 – Gnat Hole, Glossop -Christian Heintzen
Barred Chestnut - 25th July 2025 - Glossop - Christian Heintzen
Barred Chestnut – 25th July 2025 – Glossop – Christian Heintzen
Barred Chestnut - Christian Heintzen
Barred Chestnut - 23rd August 2024 - Long Clough - Christian Heintzen
Barred Chestnut - 1st September 2024 - Gnat Hole, Glossop -Christian Heintzen
Barred Chestnut - 25th July 2025 - Glossop - Christian Heintzen


Image Gallery

No gallery images found for this moth.


Temporal Distribution Chart
Adults: (between 1917 - 2025)
(click legend below to show/hide datasets)

Distribution Map for Diarsia dahlii

Found 84 records
    ↳ from 2026+
    ↳ 20 from 2020 - 2025
    ↳ 64 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 – Diarsia dahlii

⚠️ 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: Diarsia dahlii
( data includes both Larvae and Adult Stages )

Monthly Counts By Year: Diarsia dahlii
( data is based on 'Adult' stage records only )

First/Last Recorded Dates: Diarsia dahlii
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: Diarsia dahlii
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Diarsia dahlii
AGR: 3.2%   |   Total % Change: 100%

Hectad (10kmx10km) Coverage: Diarsia dahlii
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Diarsia dahlii

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 - Diarsia dahlii – 84 records available

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

Site NameTetradDateCountStageRecorderSourceRecordKey
Glossop, Chunal PlantationSK09F06/09/20251adultHeintzen, Christianvc57_irecords_extractiBRC48792405
Glossop, Shittern Clough WoodlandSK09M26/08/20254adultHeintzen, Christianvc57_irecords_extractiBRC48787347
Cromford MoorSK25X21/08/20252adultAshton, Clivevc57_irecords_extractiBRC44789726
Glossop, Hague Street, Hay MeadowSK09G25/07/20251adultHeintzen, Christianvc57_irecords_extractiBRC43980592
Glossop, Shawmoor PlantationSK09G04/09/20242adultHeintzen, Christianvc57_irecords_extractiBRC38678387
Longdendale, Wildboar Clough WoodlandSK09U03/09/20241adultHeintzen, Christianvc57_irecords_extractiBRC38678341
Longdendale, Wildboar Clough WoodlandSK09U03/09/20241adultHeintzen, Christianvc57_irecords_extractiBRC38678369
Glossop, Gnat Hole Rough FieldsSK09L01/09/20241adultHeintzen, Christianvc57_irecords_extractiBRC38657857
Derbyshire Wild Life Trust Long CloughSK09G31/08/20242adultHeintzen, Christianvc57_irecords_extractiBRC38473512
High Leas Farm, RiberSK35D24/08/20241adultThorpe, Stevevc57_irecords_extractiBRC40045330
Derbyshire Wild Life Trust Long CloughSK09G23/08/20241adultHeintzen, Christianvc57_irecords_extractiBRC38473372
Lower Cromford GardenSK25Y23/08/20231adultAshton, Clivevc57_irecords_extractiBRC34568425
Glossop, Shawmoor PlantationSK09F23/08/202311adultHeintzen, Christianvc57_irecords_extractiBRC36337465
Glossop, Gnat Hole Rough FieldsSK09L21/08/20231adultHeintzen, Christianvc57_irecords_extractiBRC36337393
Derbyshire Wild Life Trust Long CloughSK09G11/08/20231adultHeintzen, Christianvc57_irecords_extractiBRC36337191
Glossop, Shawmoor PlantationSK09F19/09/20222adultHeintzen, Christianvc57_irecords_extractiBRC36335376
Glossop, Shawmoor PlantationSK09F18/09/20221adultHeintzen, Christianvc57_irecords_extractiBRC36335370
Lower Cromford GardenSK25Y07/09/20221adultAshton, Clivevc57_irecords_extractiBRC34569348
Glossop, Shawmoor PlantationSK09F06/09/20221adultHeintzen, Christianvc57_irecords_extractiBRC36335314
Hathersage, Derbyshire, UKSK28F29/07/20221adultMiles, Clairevc57_irecords_extractiBRC28567988
Not givenSK43W27/09/20192AdultBryce, Marionvc57_irecords_extractiBRC11857299
Birch ValeSK08I05/08/20191adultHewitt, Janevc57_irecords_extractiBRC35073079
Darley Dale (site not precise)SK26R01/08/20181AdultA.E.W. Morsevc57_danes_bc_dataLC000334001WPU7H
Darley Dale (site not precise)SK26R01/07/20171AdultH.C. Haywardvc57_danes_bc_dataLC000334001WPZ1P
Jim Mart Nature ReserveSK36S23/08/20161AdultMahadevan, Nikkivc57_irecords_extractiBRC34908821
School Close,Parkway Gardens,Darley DaleSK26R11/09/20132AdultA. Butlervc57_danes_bc_dataLC000334001OLDTC
School Close,Parkway Gardens,Darley DaleSK26R11/09/20132AdultA. Butlervc57_danes_bc_dataLC000334001WPO3L
Yew Tree FarmSK36H06/07/20131adultSinnott, Tonyvc57_irecords_extractiBRC38922768
Welbeck Drive,WingerworthSK36T04/09/20121AdultB.J.N. Hillvc57_danes_bc_dataLC000334001OKA9M
Beeley Moor (Slagmill Plantation)SK36E03/09/20121AdultDave Budworth;D.A. Clarke;P. Patrickvc57_danes_bc_dataLC000334001OJW0W
Beeley Moor (Slagmill Plantation)SK36E03/09/20121AdultDave Budworth;D.A. Clarke;P. Patrickvc57_danes_bc_dataLC000334001WPC33
The Mays,Malthouse Lane,FroggattSK27N02/09/20121AdultBarnacle, Brianvc57_danes_bc_dataLC000334001OKA8N
The Mays,Malthouse Lane,FroggattSK27N02/09/20121AdultB. Barnacle;K. Barnaclevc57_danes_bc_dataLC000334001WQHOR
The Mays,Malthouse Lane,FroggattSK27N11/08/20121AdultBarnacle, Brianvc57_danes_bc_dataLC000334001OJVMZ
The Mays,Malthouse Lane,FroggattSK27N11/08/20121AdultB. Barnacle;K. Barnaclevc57_danes_bc_dataLC000334001WQBOK
School Close,Parkway Gardens,Darley DaleSK26R13/09/20111AdultA. Butlervc57_danes_bc_dataLC000334001OK80U
Cross Green Cottages,Flint Lane,South DarleySK26Q03/09/20111AdultR. Hawksworthvc57_danes_bc_dataLC000334001OK7Y1
School Close,Parkway Gardens,Darley DaleSK26R26/08/20111AdultA. Butlervc57_danes_bc_dataLC000334001OL3YM
School Close,Parkway Gardens,Darley DaleSK26R14/08/20111AdultA. Butlervc57_danes_bc_dataLC000334001OJT9I
Cross Green Cottages,Flint Lane,South DarleySK26Q07/09/20091AdultR. Hawksworthvc57_danes_bc_dataLC000334001OK2V5
Flash Lane,Beeley MoorSK26X14/08/20091AdultRoddis, Simonvc57_danes_bc_dataLC000334001OJN0Y
Flash Lane,Beeley MoorSK26X07/08/20097AdultB.L. Stathamvc57_danes_bc_dataLC000334001OK2FM
Flash Lane,Beeley MoorSK26X29/08/200823AdultB.L. Stathamvc57_danes_bc_dataLC000334001OJL4B
Far Cross,Cavendish Park,MatlockSK36A26/08/20081AdultB.L. Stathamvc57_danes_bc_dataLC000334001OK0N7
Cross Green Cottages,Flint Lane,South DarleySK26Q24/08/20081AdultR. Hawksworthvc57_danes_bc_dataLC000334001OKLQ0
Glossop (Shire Hill Quarry)SK09M22/07/20081AdultColin Plantvc57_danes_bc_dataLC000334001OKKUZ
Cross Green Cottages,Flint Lane,South DarleySK26Q23/08/20071AdultR. Hawksworthvc57_danes_bc_dataLC000334001OJZ7F
The Hollies,Station Rd,Darley DaleSK26R23/07/20071AdultRoddis, Simonvc57_danes_bc_dataLC000334001OJYWW
Cross Green Cottages,Flint Lane,South DarleySK26Q21/09/20061AdultR. Hawksworthvc57_danes_bc_dataLC000334001OI92M
Cross Green Cottages,Flint Lane,South DarleySK26Q22/08/20061AdultR. Hawksworthvc57_danes_bc_dataLC000334001OI8QI
Cross Green Cottages,Flint Lane,South DarleySK26Q05/08/20061AdultR. Hawksworthvc57_danes_bc_dataLC000334001OI8K0
Flash Lane,Beeley MoorSK26X16/07/20063AdultB.L. Stathamvc57_danes_bc_dataLC000334001OHTK7
Cross Green Cottages,Flint Lane,South DarleySK26Q04/09/20041AdultR. Hawksworthvc57_danes_bc_dataLC000334001OJ80J
Cross Green Cottages,Flint Lane,South DarleySK26Q16/08/20031AdultR. Hawksworthvc57_danes_bc_dataLC000334001OJ4C9
The Hollies,Station Rd,Darley DaleSK26R07/08/20031AdultRoddis, Simonvc57_danes_bc_dataLC000334001OJ47D
School Close,Parkway Gardens,Darley DaleSK26R14/09/19991AdultA. Butlervc57_danes_bc_dataLC000334001OHO7X
Stocksmoor Farm, Ashover Rd, Old TuptonSK36S11/08/19975AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OI361
Beeley Lodge, ChatsworthSK26U04/08/19821AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OIAFA
Beeley Lodge, Chatsworth ParkSK26U04/08/19821AdultA.C. Warnevc57_danes_bc_dataLC000334001WPUTO
Slagmill Plantation,Beeley MoorSK36E31/08/19791AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OHGNH
Hopton Wood Quarry (site not precise)SK25M28/08/19701AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OHES2
Beeley Moor, Beeley (site not precies)SK26Z10/08/19681AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OHW2Z
Beeley Moor, Beeley (site not precise)SK26Z10/08/19681AdultB. Elliottvc57_danes_bc_dataLC000334001WOP5G
Gladwin's Mark, Beeley MoorSK36D01/09/19641AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OIH7M
Moorend, Beeley, MatlockSK26T25/08/19592AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OHE4C
Moorend, BeeleySK26T25/08/19592AdultB.S. Fletchervc57_danes_bc_dataLC000334001WOOVU
Moorend, Beeley, MatlockSK26T22/08/19591AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OIDMT
Moorend, BeeleySK26T22/08/19591AdultB.S. Fletchervc57_danes_bc_dataLC000334001WOOV8
Moorend, Beeley, MatlockSK26T20/08/19592AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OHVMQ
Moorend, BeeleySK26T20/08/19592AdultB.S. Fletchervc57_danes_bc_dataLC000334001WPIQF
Beeley, MatlockSK26T06/08/19571AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OHEWW
BeeleySK26T06/08/19571AdultB.S. Fletchervc57_danes_bc_dataLC000334001WOSOL
Froggatt (site not precise)SK27N28/08/19541AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OIDF0
Froggatt (site not precise)SK27N28/08/19541AdultA.M. Emmetvc57_danes_bc_dataLC000334001WPQ7X
Littleover, Derby (site not precise)SK33G01/01/19511Adult[VC57 Recorder]vc57_danes_bc_dataLC000334001TAGFO
Littleover, Derby (site not precise)SK33G01/01/19511AdultA.H. Turnervc57_danes_bc_dataLC000334001WOSKW
Froggatt (site not precise)SK27N28/08/19481AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OHDHP
Froggatt (site not precise)SK27N28/08/19481AdultA.M. Emmetvc57_danes_bc_dataLC000334001WOSKJ
Darley Dale (site not precise)SK26R01/08/19181AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OID90
Darley Dale (site not precise)SK26R01/07/19171AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OID7Y
Bakewell (site not precise)SK26J01/01/18941Adult[VC57 Recorder]vc57_danes_bc_dataLC000334001TAGB1
Bakewell (site not precise)SK26J01/01/18941AdultR.H. Fullervc57_danes_bc_dataLC000334001WPQ3Y
Derbyshire (site not precise)SK33L01/01/18701AdultE. Newmanvc57_danes_bc_dataLC000334001WPZ7W
Derbyshire (site not precise)SK33L01/01/18001AdultVC57 Derbyshire Recordervc57_danes_bc_dataLC000334001OJYHT

Flame Shoulder       Purple Clay

Copyright Tony Davison © 2024 - 2026 www.derbyshiremoths.org

Scroll to Top