62.021 BF1441 – Rosy Knot-horn – Oncocera semirubella – (Scopoli, 1763)
Adult Micro: CAT 1 – Distinctive species unlikely to be confused with others – Leaf-miner: CAT A – Recorded accepted without the leaf or a photo – Larval Case: C1 – Distinctive Species –
– click for General Verification Guidelines | – click for Specific Verification Guidelines
– 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 17 December 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.
Temporal Distribution Chart
Adults: (between 2024 - 2025)
(click legend below to show/hide datasets)
Distribution Map for Oncocera semirubella
Found 8 records
↳ from 2026+
↳ 8 from 2020 - 2025
↳ from Before 2020
↳ from 2026+
↳ 8 from 2020 - 2025
↳ from Before 2020
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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
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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
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Recordings By Year: Oncocera semirubella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Oncocera semirubella
AGR: 0% | Total % Change: 0%
Hectad (10kmx10km) Coverage: Oncocera semirubella
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Oncocera semirubella
Oncocera semirubella
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 2020-2026.
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 | Recorder | Source | RecordKey |
|---|---|---|---|---|---|---|---|
| Staveley Derbyshire | SK47H | 22/07/2025 | 1 | adult | Morris, Sid | vc57_irecords_extract | iBRC43756899 |
| Aston-on-Trent, Derbyshire | SK43A | 10/07/2025 | 1 | adult | Waldron, Robert | vc57_irecords_extract | iBRC43216055 |
| Findern, Derbyshire | SK33A | 04/07/2025 | 1 | adult | Hallam, Brian | vc57_irecords_extract | iBRC43089501 |
| Findern, Derbyshire | SK33A | 30/06/2025 | 1 | adult | Hallam, Brian | vc57_irecords_extract | iBRC42918811 |
| Chaddesden, Derby | SK33T | 30/06/2025 | 1 | adult | roome, martin | vc57_irecords_extract | iBRC43931951 |
| Wingerworth, Derbyshire | SK36Y | 13/08/2024 | 1 | Adult | Windle, Jim | vc57_irecords_extract | iBRC37874391 |
| Sandiacre | SK43S | 01/08/2024 | 1 | adult | paul buxton | vc57_irecords_extract | iBRC37665841 |
| ambaston gravel pits | SK43F | 17/07/2024 | 1 | adult | roome, martin | vc57_irecords_extract | iBRC38321651 |