– click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Uncertain/Unknown – Insufficient Data 
– Migrant
– easy to identify, generally distinctive and unlikely to be confused with other species.ID pointers: Unmistakeable, with pink and yellow forewings that sometimes show a whitish stripe along the leading edge.
Distribution: (First record: 17 July 2024 at Ambaston Gravel Pits ) – (Last record: 22 July 2025 at Staveley ) – A new species to Derbyshire & VC57, when one was attracted to a light trap at Ambaston Gravel Pits overnight on 17th July 2024 by Martin Roome. Possible immigrant or range expansion into the south of the county? A second record came from Sandiacre on 1st August 2024 by Paul Buxton. A third record from Wingerworth on 3rd August 2024 by Jim Windle. The 4th & 5th Records were recorded on 30th June 2025 from Findern & Chaddesden. 6th record came from Staveley 22/7/2025.
General Comment: None *** Last updated on 7 November 2025 by RP ***
Last Recorded Year: 2025
Last Recorded By – Sid Morris
Last Recorded General Area – Staveley
Selected Images: Ambaston Gravel Pits, Derbyshire – Martin Roome © / Sandiacre, Derbyshire – Paul Buxton© / Findern (2025) – Brian Hallam© / Chaddesden (2025) – Martin Roome©
Image Gallery
No gallery images found for this moth.
Distribution Map for Oncocera semirubella
Found 8 records
↳ 5 from After 2025
↳ 3 from 2020 - 2024
↳ 0 from Before 2020
↳ 5 from After 2025
↳ 3 from 2020 - 2024
↳ 0 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 – Oncocera semirubella
⚠️ 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:
Oncocera semirubella
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Oncocera semirubella
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Oncocera semirubella
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: Oncocera semirubella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Oncocera semirubella
AGR: 0% | Total % Change: 0%
CUSUM Analysis: Oncocera semirubella
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 10 (October) 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: Oncocera semirubella
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Oncocera semirubella
Oncocera semirubella
( 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 - Oncocera semirubella – 8 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Staveley Derbyshire | SK47H | 22/07/2025 | 1 | adult | vc57_irecords_extract |
| Aston-on-Trent, Derbyshire | SK43A | 10/07/2025 | 1 | adult | vc57_irecords_extract |
| Findern, Derbyshire | SK33A | 04/07/2025 | 1 | adult | vc57_irecords_extract |
| Findern, Derbyshire | SK33A | 30/06/2025 | 1 | adult | vc57_irecords_extract |
| Chaddesden, Derby | SK33T | 30/06/2025 | 1 | adult | vc57_irecords_extract |
| Wingerworth, Derbyshire | SK36Y | 13/08/2024 | 1 | Adult | vc57_irecords_extract |
| Sandiacre | SK43S | 01/08/2024 | 1 | adult | vc57_irecords_extract |
| ambaston gravel pits | SK43F | 17/07/2024 | 1 | adult | vc57_irecords_extract |