– click for Adult Macro Verification Guidelines
– Rare / Uncommon / Scarce
– easy to identify, generally distinctive and unlikely to be confused with other species.ID pointers: Can be olive brown or rusty brown ground colour. Four distinct white flecks in varying size along the leading edge of the forewing and two thin cross-lines with distinct “V” shaped points. Distinguish this from the other British Cosmia species
Distribution: (Last record: 18 July 2025 at Belper ) – A rare and locally distributed species in Derbyshire, that seems to be restricted to isolated lowland areas of the county. Another Cosmia species that has been affected by Dutch elm disease.
*** Last updated on 2 October 2025 by RP ***
Forewing: 12-16mm
Last Recorded Year: 2025
Last Recorded By – Dave Evans
Last Recorded General Area – Belper
Selected Images: Cromford, Derbyshire July 28th 2022 – Clive Ashton© / Belper (2025) Dave Evans©
Image Gallery
No gallery images found for this moth.
Distribution Map for Cosmia affinis
Found 29 records
↳ 2 from After 2025
↳ 3 from 2020 - 2024
↳ 24 from Before 2020
↳ 2 from After 2025
↳ 3 from 2020 - 2024
↳ 24 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 – Cosmia affinis
⚠️ 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:
Cosmia affinis
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Cosmia affinis
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Cosmia affinis
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: Cosmia affinis
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Cosmia affinis
AGR: -7.41% | Total % Change: -75%
CUSUM Analysis: Cosmia affinis
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 21 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 2009, reaching above average levels. The lowest population point occurred near 2025, 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: Cosmia affinis
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Cosmia affinis
Cosmia affinis
( 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 - Cosmia affinis – 29 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| upper cromford garden | SK25Y | 11/07/2025 | 1 | adult | vc57_irecords_extract |
| Belper | SK34U | 18/07/2025 | 1 | adult | vc57_irecords_extract |
| Lower Cromford Garden | SK25Y | 09/08/2022 | 1 | adult | vc57_irecords_extract |
| Lower Cromford Garden | SK25Y | 14/08/2022 | 1 | adult | vc57_irecords_extract |
| Lower Cromford Garden | SK25Y | 27/07/2022 | 1 | adult | vc57_irecords_extract |
| The Old Manse, Ault Hucknall, Glapwell | SK46S | 02/09/2013 | 1 | Adult | vc57_danes_bc_data |
| The Old Manse, Ault Hucknall, Glapwell | SK46S | 02/09/2013 | 1 | Adult | vc57_danes_bc_data |
| The Old Manse, Ault Hucknall, Glapwell | SK46S | 23/08/2013 | 1 | Adult | vc57_danes_bc_data |
| The Old Manse, Ault Hucknall, Glapwell | SK46S | 23/08/2013 | 1 | Adult | vc57_danes_bc_data |
| Repton (site not precise) | SK32B | 01/07/2009 | 2 | Adult | vc57_danes_bc_data |
| Repton (site not precise) | SK32B | 23/07/2009 | 1 | Larvae | vc57_danes_bc_data |
| Repton (site not precise) | SK32B | 01/08/2007 | 4 | Adult | vc57_danes_bc_data |
| Carsington Ave, Allestree, Derby | SK33J | 10/08/1986 | 1 | Adult | vc57_danes_bc_data |
| Drummond Rd, Ilkeston | SK44R | 07/09/1980 | 1 | Adult | vc57_danes_bc_data |
| Wolds Rise, Cavendish Rd, Matlock | SK36A | 04/08/1979 | 1 | Adult | vc57_danes_bc_data |
| Askew Grove, Repton | SK32D | 24/07/1976 | 1 | Adult | vc57_danes_bc_data |
| Repton (site not precise) | SK32B | 22/07/1946 | 1 | Adult | vc57_danes_bc_data |
| Lathkill Dale (site not precise) | SK16S | 01/01/1905 | 1 | Adult | vc57_danes_bc_data |
| Kedleston St, Derby (site assumed to be his garden) | SK33N | 01/01/1905 | 1 | Adult | vc57_danes_bc_data |
| Lathkill Dale (site not precise) | SK16S | 01/01/1900 | 1 | Adult | vc57_danes_bc_data |
| Kedleston St, Derby (site assumed to be his garden) | SK33N | 01/01/1900 | 1 | Adult | vc57_danes_bc_data |
| Bretby area, Swadlincote (site not precise) | SK22W | 01/01/1885 | 1 | Adult | vc57_danes_bc_data |
| Repton Shrubs, Repton (site not precise) | SK32B | 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 |
| Bretby area, Swadlincote (site not precise) | SK22W | 01/01/1885 | 1 | Adult | vc57_danes_bc_data |
| Repton Shrubs, Repton (site not precise) | SK32B | 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 |
| Derbyshire (site not precise) | SK33L | 01/01/1870 | 1 | Adult | vc57_danes_bc_data |
| Derbyshire (site not precise) | SK33L | 01/01/1800 | 1 | Adult | vc57_danes_bc_data |