73.137 BF2377 – Fen Wainscot – Arenostola phragmitidis – (Hübner, 1803)
Adult Macro: CAT 3 – Difficult to identify – Quality set of photographs required – 
– click for Adult Macro Verification Guidelines
– click for Adult Macro Verification Guidelines
– Rare / Uncommon / Scarce
– easy to identify, generally distinctive and unlikely to be confused with other species.ID pointers: An unmistakable species. The smooth rather slender moth with a broad unmarked forewing being a light reddish-brown or light greyish-straw. Sometimes darker in colour tones. The colour becomes darker towards the outer edge of the wings.
Distribution: (First record: 1991 ) – (Last record: 17 July 2025 at Markham Vale Complex ) – A rare and localised species in Derbyshire, and a new colonist to the county when first recorded in 1991. Two more records in the 90’s and the first record for the decade in 2008 from Darley Dale. Small numbers are being recorded each year.
General Comment: None *** Last updated on 24 February 2026 by TD ***
Forewing: 14-16mm
Last Recorded Year: 2025
First Recorded Year: 1991
Last Recorded By – Mark Radford
Last Recorded General Area – Markham Vale Complex
Selected Images: Darley Dale, Derbyshire – Simon Roddis©
Image Gallery
Temporal Distribution Chart
Adults: (between 1991 - 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 Arenostola phragmitidis
Found 14 records
↳ from 2026+
↳ 8 from 2020 - 2025
↳ 6 from Before 2020
↳ from 2026+
↳ 8 from 2020 - 2025
↳ 6 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 – Arenostola phragmitidis
⚠️ 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:
Arenostola phragmitidis
( data includes both Larvae and Adult Stages )
Monthly Counts By Year:
Arenostola phragmitidis
( data is based on 'Adult' stage records only )
First/Last Recorded Dates: Arenostola phragmitidis
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: Arenostola phragmitidis
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Arenostola phragmitidis
AGR: 2.41% | Total % Change: 50%
Hectad (10kmx10km) Coverage: Arenostola phragmitidis
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Arenostola phragmitidis
Arenostola phragmitidis
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 - Arenostola phragmitidis – 14 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Recorder | Source | RecordKey |
|---|---|---|---|---|---|---|---|
| Markham Vale South Tip | SK47K | 17/07/2025 | 1 | Adult | Radford, Mark | vc57_irecords_extract | iBRC43666416 |
| Markham Vale South Tip Derbyshire | SK47K | 14/07/2025 | 2 | Adult | Morris, Sid | vc57_irecords_extract | iBRC43443806 |
| Markham Vale Derbyshire | SK47L | 26/08/2024 | 1 | Adult | Morris, Sid | vc57_irecords_extract | iBRC38395990 |
| Markham Vale Derbyshire | SK47L | 25/07/2024 | 1 | Adult | Morris, Sid | vc57_irecords_extract | iBRC37377672 |
| Markham Vale Derbyshire | SK47L | 10/08/2023 | 7 | Adult | Morris, Sid | vc57_irecords_extract | iBRC32410379 |
| Woodland Ave | SK43R | 28/07/2023 | 1 | Adult | Thorpe, Steve | vc57_irecords_extract | iBRC33496846 |
| Markham Vale Derbyshire | SK47L | 05/07/2023 | 1 | Adult | Morris, Sid | vc57_irecords_extract | iBRC31380578 |
| Woodland Ave | SK43R | 20/07/2021 | 1 | Adult | Thorpe, Steve | vc57_irecords_extract | iBRC33498966 |
| Pleasley Pit CP, Pleasley | SK46X | 25/07/2018 | 1 | Adult | B.J.N. Hill | vc57_danes_bc_data | LC000334001WPTYG |
| Pleasley NR (Pit Head) | SK46X | 13/08/2012 | 1 | Adult | B.J.N. Hill | vc57_danes_bc_data | LC000334001OK9XN |
| The Hollies,Station Rd,Darley Dale | SK26R | 30/07/2008 | 1 | Adult | Roddis, Simon | vc57_danes_bc_data | LC000334001OK0F4 |
| Stevens Rd, Sandiacre | SK43T | 27/07/1995 | 1 | Adult | VC57 Derbyshire Recorder | vc57_danes_bc_data | LC000334001OIZ6G |
| Holbrook Heath, Killamarsh | SK48K | 30/07/1994 | 2 | Adult | H.E. Beaumont | vc57_danes_bc_data | LC000334001OHMJX |
| Deerlands Rd, Ashgate, Chesterfield | SK37K | 17/07/1991 | 1 | Adult | B. Elliott | vc57_danes_bc_data | LC000334001WPE9C |