– click for Adult Macro Verification Guidelines
– Rare / Uncommon / Scarce
** Photograph required
**
– easy to identify, generally distinctive and unlikely to be confused with other species.ID pointers: Fairly distinctive looking moth. Scalloped trailing edges to the wings and overall golden brown ground colour, with two dark-brown wavy cross-lines running through both wings.
Distribution: (Last record: 22 July 2019 at Long Eaton ) – A resident in Derbyshire, that is scarce and very locally distributed through the Trent Valley area. Very few records.
*** Last updated on 2 October 2025 by RP ***
Forewing: 11-13mm
Last Recorded Year: 2019
Last Recorded By – Marion Bryce
Last Recorded General Area – Long Eaton
Selected Images: No images
Image Gallery
No gallery images found for this moth.
Distribution Map for Idaea emarginata
Found 31 records
↳ 0 from After 2025
↳ 0 from 2020 - 2024
↳ 31 from Before 2020
↳ 0 from After 2025
↳ 0 from 2020 - 2024
↳ 31 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 – Idaea emarginata
⚠️ 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:
Idaea emarginata
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Idaea emarginata
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Idaea emarginata
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: Idaea emarginata
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Idaea emarginata
AGR: 0% | Total % Change: 0%
CUSUM Analysis: Idaea emarginata
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 22 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 8 (August) 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 2002, reaching above average levels. The lowest population point occurred near 2002, 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: Idaea emarginata
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Idaea emarginata
Idaea emarginata
( 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 - Idaea emarginata – 31 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Forbes Hole | SK43W | 22/07/2019 | 1 | adult | vc57_irecords_extract |
| Wilmot St,Long Eaton | SK43R | 10/07/2010 | 1 | Adult | vc57_danes_bc_data |
| Armitage Drive, Long Eaton | SK53B | 25/07/2003 | 1 | Adult | vc57_danes_bc_data |
| Armitage Drive, Long Eaton | SK53B | 10/07/2002 | 1 | Adult | vc57_danes_bc_data |
| Springfield Ave, Sandiacre | SK43S | 16/07/1992 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 01/08/1984 | 2 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 01/08/1984 | 2 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 21/07/1984 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 30/07/1984 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 21/07/1984 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 30/07/1984 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 18/07/1983 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 26/07/1983 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 18/07/1983 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 26/07/1983 | 1 | Adult | vc57_danes_bc_data |
| Askew Grove, Repton | SK32D | 13/07/1982 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 14/07/1982 | 1 | Adult | vc57_danes_bc_data |
| Hilton NR, Hilton, Burton on Trent | SK23K | 09/07/1982 | 3 | Adult | vc57_danes_bc_data |
| Wilmot St, Sawley, Long Eaton | SK43R | 16/07/1982 | 2 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 14/07/1982 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 04/08/1981 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 12/08/1981 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 04/08/1981 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 12/08/1981 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 10/07/1973 | 2 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 11/07/1973 | 1 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 12/07/1973 | 2 | Adult | vc57_danes_bc_data |
| Shardlow Hall, Shardlow, Long Eaton | SK43F | 11/07/1967 | 1 | Adult | vc57_danes_bc_data |
| Barrow on Trent, Derby (site not precise) | SK32P | 01/01/1885 | 1 | Adult | vc57_danes_bc_data |
| Barrow on Trent, Derby (site not precise) | SK32P | 01/01/1885 | 1 | Adult | vc57_danes_bc_data |
| Repton (site not precise) | SK32B | 01/01/1800 | 1 | Adult | vc57_danes_bc_data |