– click for Adult Macro Verification Guidelines
– Significant Record / Very Rare / Vagrant
** Photograph required
**
– care required in the identification process, as confusion with similar species is likely – quality photographs required. Distribution: (First record: 1866 at Findern ) – (Last record: 29 August 2011 at Dovedale ) – A very rare species, probably extinct in the county or only holding on in a very isolated population in Dovedale where it was last recorded. It is predominantly a moorland species. In 1986 only six records were known, with the first record in 1866 from Findern and the last one being recorded in 1975. Since only four records of 5 individuals all recorded from Dovedale by the same recorder. The last record in 2011.
*** Last updated on 2 October 2025 by RP ***
Forewing: 13-17mm
Last Recorded Year: 2011
First Recorded Year: 1866
Last Recorded By – Dave Grundy
Last Recorded General Area – Dovedale
Selected Images: No images
Image Gallery
No gallery images found for this moth.
Distribution Map for Stilbia anomala
Found 11 records
↳ 0 from After 2025
↳ 0 from 2020 - 2024
↳ 11 from Before 2020
↳ 0 from After 2025
↳ 0 from 2020 - 2024
↳ 11 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 – Stilbia anomala
⚠️ 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:
Stilbia anomala
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Stilbia anomala
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Stilbia anomala
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: Stilbia anomala
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Stilbia anomala
AGR: 50% | Total % Change: 50%
CUSUM Analysis: Stilbia anomala
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 24 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 2011, reaching above average levels. The lowest population point occurred near 2010, 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: Stilbia anomala
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Stilbia anomala
Stilbia anomala
( 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 - Stilbia anomala – 11 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Dovedale | SK15K | 29/08/2011 | 1 | Adult | vc57_danes_bc_data |
| Dovedale | SK15K | 29/08/2011 | 2 | Adult | vc57_danes_bc_data |
| Dovedale | SK15K | 15/08/2010 | 1 | Adult | vc57_danes_bc_data |
| Dovedale | SK15K | 15/08/2010 | 1 | Adult | vc57_danes_bc_data |
| Wolds Rise, Cavendish Rd, Matlock | SK36A | 14/08/1975 | 1 | Adult | vc57_danes_bc_data |
| Slagmill Plantation,Beeley Moor | SK36E | 17/09/1963 | 1 | Adult | vc57_danes_bc_data |
| Newbold Rd, Chesterfield | SK37R | 19/08/1962 | 1 | Adult | vc57_danes_bc_data |
| Taxal, Whaley Bridge (site not precise) | SK07E | 01/08/1947 | 1 | Adult | vc57_danes_bc_data |
| Taxal, Whaley Bridge (site not precise) | SK07E | 01/08/1947 | 1 | Adult | vc57_danes_bc_data |
| Findern, Derby (site not precise) | SK33A | 01/01/1866 | 1 | Adult | vc57_danes_bc_data |
| Findern, Derby (site not precise) | SK33A | 01/01/1866 | 1 | Adult | vc57_danes_bc_data |