62.012 BF1451 – Dusky Knot-horn – Pyla fusca – (Haworth, 1811)
Adult Micro: CAT 1 – Distinctive species unlikely to be confused with others – Leaf-miner: CAT A – Recorded accepted without the leaf or a photo – Larval Case: C1 – Distinctive Species –
– click for General Verification Guidelines | – click for Specific Verification Guidelines
– click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Rare / Uncommon / Scarce
– difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required. ID pointers: Sooty black with finer pale speckling and dusting and two paler cross-lines.
Distribution: (Last record: 25 August 2025 at Glossop ) – A species of heathland and moorland and widely distributed across the heather moorland in Derbyshire. Has a habit of resting on burnt heather, where its colouration makes for cryptic camouflage.
General Comment: None *** Last updated on 24 January 2026 by TD ***
Last Recorded Year: 2025
Last Recorded By – Christian Heintzen
Last Recorded General Area – Glossop
Selected Images:
Buxton, Derbyshire – Steve Orridge© / Glossop (Aug 2025) – Christian Heintzen©
Image Gallery
No gallery images found for this moth.
Temporal Distribution Chart
Adults: (between 1971 - 2025)
(click legend below to show/hide datasets)
Distribution Map for Pyla fusca
Found 18 records
↳ from 2026+
↳ 10 from 2020 - 2025
↳ 8 from Before 2020
↳ from 2026+
↳ 10 from 2020 - 2025
↳ 8 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 – Pyla fusca
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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:
Pyla fusca
( data includes both Larvae and Adult Stages )
Monthly Counts By Year:
Pyla fusca
( data is based on 'Adult' stage records only )
First/Last Recorded Dates: Pyla fusca
Adult-only & Anything [Larvae, Pupae, Adult, Mines]
Shading shows moth presence between dates
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Recordings By Year: Pyla fusca
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Pyla fusca
AGR: 0% | Total % Change: 0%
Hectad (10kmx10km) Coverage: Pyla fusca
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Pyla fusca
Pyla fusca
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 - Pyla fusca – 18 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Recorder | Source | RecordKey |
|---|---|---|---|---|---|---|---|
| Glossop, Hague Street, Hay Meadow | SK09G | 25/08/2025 | 1 | adult | Heintzen, Christian | vc57_irecords_extract | iBRC48746986 |
| Wingerworth, Derbyshire | SK36Y | 08/08/2025 | 1 | adult | Windle, Jim | vc57_irecords_extract | iBRC44247241 |
| Buxton SK, UK | SK07S | 18/06/2022 | 1 | Adult | Orridge, Steve | vc57_irecords_extract | iBRC25898086 |
| Buxton SK, UK | SK07S | 27/06/2021 | 1 | Adult | Orridge, Steve | vc57_irecords_extract | iBRC23083567 |
| Ladycroft Ave, Buxton | SK07S | 26/06/2021 | 1 | adult | Orridge, Steve | vc57_irecords_extract | iBRC35092832 |
| Ladycroft Ave, Buxton | SK07S | 16/07/2020 | 1 | adult | Orridge, Steve | vc57_irecords_extract | iBRC35095586 |
| Birch Vale | SK08I | 26/06/2020 | 1 | adult | Hewitt, Jane | vc57_irecords_extract | iBRC35066954 |
| Allestree, Derby | SK33P | 16/06/2020 | 1 | adult | Plant, Stephen | vc57_irecords_extract | iBRC46344260 |
| Birch Vale | SK08I | 15/06/2020 | 2 | adult | Hewitt, Jane | vc57_irecords_extract | iBRC35066694 |
| Buxton SK, UK | SK07S | 07/06/2020 | 1 | Adult | Orridge, Steve | vc57_irecords_extract | iBRC33708455 |
| Ladycroft Ave, Buxton | SK07S | 10/07/2019 | 1 | adult | Orridge, Steve | vc57_irecords_extract | iBRC35097046 |
| Ladycroft Ave | SK07S | 16/07/2013 | 1 | adult | Orridge, Steve | vc57_irecords_extract | iBRC40990993 |
| Beeley Moor, Beeley | SK26Y | 06/06/2007 | 6 | Adult | B.L. Statham | vc57_danes_bc_data | LC000334001COS9M |
| The Hollies,Station Rd,Darley Dale | SK26R | 20/07/2004 | 1 | Adult | Roddis, Simon | vc57_danes_bc_data | LC000334001CP21H |
| Deerlands Rd, Ashgate, Chesterfield | SK37K | 11/07/1992 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001CP0ZC |
| Deerlands Rd, Ashgate, Chesterfield | SK37K | 22/06/1992 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001COV8X |
| Deerlands Rd, Ashgate, Chesterfield | SK37K | 15/06/1989 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001CP0TQ |
| Newbold Ave, Chesterfield | SK37R | 22/08/1971 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001COZJE |