– click for Adult Macro Verification Guidelines
– Significant Record / Very Rare / Vagrant 
– Migrant
– easy to identify, generally distinctive and unlikely to be confused with other species.ID pointers: Unmistakable – the Blue Underwing
Distribution: (Last record: 11 September 2025 at North Wingfield ) – Last recorded 2024 – A very rare migrant, and now range expansion from the south, possibly now established in Derbyshire and surrounding counties – An unprecedented eight individuals were trapped during September 2023 and three more in October 2023, including my very first one in my garden trap on 10th October 2023. None were pristine individuals, indicating possible migration, or a long flight. Other modern day records include 2012 from Findern and one seen and photographed October 14th 2020 at Calke Park. A pristine individual was recorded from a garden light trap in Chaddesden, Derby on 7th September 2024.one Belper 15/8/2025; Sept 2025 North Wingfield
*** Last updated on 2 October 2025 by RP ***
Forewing: 41-48mm
Last Recorded Year: 2025
Last Recorded By – Shane Harper
Last Recorded General Area – North Wingfield
Selected Images: Images from Tony Davison © , Brian Hobby © and Iain McGowan ©/ Belper (Aug 2025) Dave Newcombe© Sept 2025 Shane Harper©
Image Gallery
Distribution Map for Catocala fraxini
Found 36 records
↳ 12 from After 2025
↳ 22 from 2020 - 2024
↳ 2 from Before 2020
↳ 12 from After 2025
↳ 22 from 2020 - 2024
↳ 2 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 – Catocala fraxini
⚠️ 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:
Catocala fraxini
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Catocala fraxini
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Catocala fraxini
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: Catocala fraxini
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Catocala fraxini
AGR: 0% | Total % Change: 0%
CUSUM Analysis: Catocala fraxini
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 19 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 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: Catocala fraxini
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Catocala fraxini
Catocala fraxini
( 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 - Catocala fraxini – 36 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Midway, Derbys. | SK32A | 04/09/2025 | 1 | adult | vc57_irecords_extract |
| mellor | SJ98Z | 09/09/2025 | 1 | adult | vc57_irecords_extract |
| North Wingfield, Derbyshire | SK46C | 12/09/2025 | 1 | adult | vc57_irecords_extract |
| Findern, Derbyshire | SK33A | 18/09/2025 | 1 | adult | vc57_irecords_extract |
| upper cromford garden | SK25Y | 18/09/2025 | 1 | adult | vc57_irecords_extract |
| River Derwent nr Raynesway, Derby | SK33X | 24/09/2025 | 1 | adult | vc57_irecords_extract |
| Belper, Derbyshire | SK34N | 15/08/2025 | 1 | adult | vc57_irecords_extract |
| Cote Heath Allotments, Buxton | SK07R | 23/08/2025 | 1 | adult | vc57_irecords_extract |
| Allestree, Derby | SK33P | 25/08/2025 | 1 | adult | vc57_irecords_extract |
| Buxton | SK07R | 29/08/2025 | 1 | Adult | vc57_irecords_extract |
| Mellor | SJ98Z | 30/08/2025 | 1 | adult | vc57_irecords_extract |
| Ilkeston, Derbyshire | SK44K | 22/08/2025 | 1 | adult | vc57_irecords_extract |
| Ilkeston, Derbyshire | SK44K | 20/09/2024 | 1 | adult | vc57_irecords_extract |
| Ashbourne, Derbyshire | SK24N | 22/09/2024 | 1 | adult | vc57_irecords_extract |
| Shirland - Hallfieldgate Lane | SK35Z | 20/09/2024 | 1 | Adult | vc57_irecords_extract |
| Sandiacre | SK43S | 09/08/2024 | 1 | adult | vc57_irecords_extract |
| Chaddesden, Derby | SK33T | 08/08/2024 | 1 | adult | vc57_irecords_extract |
| Melbourne, Derbyshire | SK32X | 09/10/2023 | 1 | adult | vc57_irecords_extract |
| Woodland Ave | SK43R | 06/10/2023 | 1 | adult | vc57_irecords_extract |
| Havercroft Road | SK38L | 07/10/2023 | 1 | Adult | vc57_irecords_extract |
| Repton Derbyshire | SK32D | 12/09/2023 | 1 | adult | vc57_irecords_extract |
| Millhouses, Sheffield | SK38M | 14/09/2023 | 1 | adult | vc57_irecords_extract |
| Southbourne Mews, Southbourne Road, Sheffield, SQN | SK38M | 20/09/2023 | 1 | adult | vc57_irecords_extract |
| Woodland Ave | SK43R | 24/09/2023 | 1 | adult | vc57_irecords_extract |
| Shirland - Hallfieldgate Lane | SK35Z | 22/09/2023 | 1 | Adult | vc57_irecords_extract |
| Lower Cromford Garden | SK25Y | 17/09/2023 | 1 | adult | vc57_irecords_extract |
| Findern Garden | SK33A | 08/09/2023 | 1 | Adult | vc57_irecords_extract |
| Froggatt, Hope Valley | SK27N | 17/09/2023 | 1 | adult | vc57_irecords_extract |
| Calke Park | SK32R | 02/10/2022 | 1 | adult | vc57_irecords_extract |
| Etches Park, Wilmorton, Derby | SK33S | 13/09/2021 | 1 | adult | Danes_2019-2021 |
| Briar Close, Newhall, Swadlincote | SK22V | 10/09/2021 | 1 | adult | Danes_2019-2021 |
| Calke Explore, Calke Abbey | SK32L | 14/10/2020 | 1 | adult | vc57_irecords_extract |
| Calke Park (nr Betty's Pool), Ticknall | SK32L | 14/10/2020 | 1 | adult | Danes_2019-2021 |
| Somercotes, Alfreton | SK45G | 01/09/2020 | 1 | adult | Danes_2019-2021 |
| Burton Rd, Findern, Derby | SK33A | 07/09/2012 | 1 | Adult | vc57_danes_bc_data |
| Ault Hucknall,Glapwell | SK46S | 25/09/1966 | 1 | Adult | vc57_danes_bc_data |