– click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Rare / Uncommon / Scarce
** Identification write up required for species page
**
– care required in the identification process, as confusion with similar species is likely – quality photographs required. Confusion Species: Celypha lacunana (Common Marble); Celypha cespitana
(Thyme Marble)
Distribution: (Last record: 6 January 2024 at Bow Wood Lea ) – Appears to be an uncommon species in the recording area – scattered records few and far between – should be more common on the moors as Bilberry is a food plant.Harrison & Sterling listed records from 1905 – 1956 from a number of areas. Latest accounts are DaNES 10 records between 1989 – 2013 and iRecord 8 accounts between 2003 – 2024.
*** Last updated on 2 October 2025 by RP ***
Last Recorded Year: 2024
Last Recorded By – Alison Pritchard (iRecord)
Last Recorded General Area – Bow Wood Lea
Selected Images:
Image Gallery
No gallery images found for this moth.
Distribution Map for Orthotaenia undulana
Found 23 records
↳ 3 from After 2025
↳ 7 from 2020 - 2024
↳ 13 from Before 2020
↳ 3 from After 2025
↳ 7 from 2020 - 2024
↳ 13 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 – Orthotaenia undulana
⚠️ 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:
Orthotaenia undulana
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Orthotaenia undulana
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Orthotaenia undulana
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: Orthotaenia undulana
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Orthotaenia undulana
AGR: 2.35% | Total % Change: 66.7%
CUSUM Analysis: Orthotaenia undulana
About this chart: CUSUM (Cumulative Sum) charts track long-term trends in moth populations [ filtered by 'Adult' and 'Mine' life stages ] by showing whether each year’s counts are above or below the historical average. Even small shifts build up over time, making trends of growth, stability, or decline easier to see. CUSUM highlights trend-consistency — asking: “Across the years, have moth counts mostly stayed above or below average?”
The data sample has 16 gap year/s here (zero records) between 2000 and 2025. The moth may have been present in those gap years, but no data was available. Too many year-gaps may exaggerate or skew the chart.
Counts for the current year (2025) are pro-rated based on data available up to month 9 (September) to provide a full-year equivalent.
ⓘ
Purple line rises = years better than average; falls = years worse than average.
Peak (best year)
Trough (worst year)
Growth periods
Decline periods
Population peaked around 2025, reaching above average levels. The lowest population point occurred near 2024, showing a significant decline.
What the Y-axis "Cumulative Deviation" means: Cumulative Deviation shows the running total of how each year’s moth population count differs from the long-term average. i
Hectad (10kmx10km) Coverage: Orthotaenia undulana
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Orthotaenia undulana
Orthotaenia undulana
( data includes Adult Stage only )
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 2020-2025.
Records Behind the Map and Charts - Orthotaenia undulana – 23 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Longdendale, Wildboar Clough Woodland | SK09U | 18/06/2025 | 1 | adult | vc57_irecords_extract |
| Derbyshire Wild Life Trust Long Clough | SK09G | 15/06/2025 | 1 | adult | vc57_irecords_extract |
| Markham Vale North tip , Derbyshire | SK47L | 01/06/2025 | 3 | adult | vc57_irecords_extract |
| Derbyshire, UK | SK27I | 18/06/2024 | 1 | Adult | vc57_irecords_extract |
| Bow Wood, Lea | SK35D | 01/06/2024 | 1 | adult | vc57_irecords_extract |
| Ferneydale Avenue | SK07Q | 26/06/2021 | 1 | adult | vc57_irecords_extract |
| Blacka Moor | SK28V | 30/05/2021 | 1 | adult | vc57_irecords_extract |
| Hathersage | SK28F | 14/08/2020 | 1 | adult | vc57_irecords_extract |
| Findern, Derbyshire, DEAZ | SK33A | 12/06/2020 | 1 | adult | vc57_irecords_extract |
| Allestree, Derby | SK33P | 01/06/2020 | 2 | adult | vc57_irecords_extract |
| Millstone Edge | SK28K | 07/07/2014 | 1 | adult | vc57_irecords_extract |
| The Hollies,Holly St,Stapenhill,Burton on Trent | SK22K | 29/08/2013 | 1 | Adult | vc57_danes_bc_data |
| Ashover, Derbyshire | SK36L | 25/06/2013 | 1 | adult | vc57_irecords_extract |
| Glebe Rise,Littleover,Derby | SK33H | 23/07/2012 | 1 | Adult | vc57_danes_bc_data |
| Millennium Meadow NR, Duffield | SK34L | 14/07/2012 | 1 | Adult | vc57_danes_bc_data |
| Millennium Meadow NR, Duffield | SK34L | 12/07/2012 | 1 | Adult | vc57_danes_bc_data |
| Crich Chase meadows,Ambergate | SK35L | 21/05/2011 | 1 | Adult | vc57_danes_bc_data |
| Wood Lane,Newhall,Swadlincote | SK22V | 30/07/2004 | 1 | Adult | vc57_danes_bc_data |
| Blacka Moor | SK28V | 06/07/2003 | 1 | Adult | vc57_irecords_extract |
| Blacka Moor, Dore, Sheffield | SK28V | 06/06/2003 | 1 | Adult | vc57_danes_bc_data |
| Rowsley Sidings, Rowsley (site not precise) | SK26S | 18/06/1994 | 1 | Adult | vc57_danes_bc_data |
| Deerlands Rd, Ashgate, Chesterfield | SK37K | 07/06/1993 | 1 | Adult | vc57_danes_bc_data |
| Clough Wood,Darley Dale | SK26K | 31/05/1989 | 1 | Adult | vc57_danes_bc_data |