– click for Adult Macro Verification Guidelines Verification Notes: A rare immigrant last recorded in 2022 – CAT set to CAT3
– Rare / Uncommon / Scarce 
– Migrant
– easy to identify, generally distinctive and unlikely to be confused with other species.ID pointers: A large and powerful looking moth. The long narrow wings help to distinguish this from other large noctuids. The immigrants that arrive from Scandinavia are grey (as is this specimen). The local British population are usually dark blackish with a variable amount of lighter grey markings.
Distribution: (Last record: 2 September 2022 at Buxton ) – Either a rare resident or a rare immigrant in Derbyshire. A scattering of records with 14 between 1968 – 1986, the majority of which were from the Matlock area indicating a possible low density colony but never been proven. During August 2007 there was a large influx into Britain and several. 5, were trapped in the county all from the Darley Dale area. Latest record is of one in a Buxton garden moth trap on 3rd September 2022.
General Comment: None *** Last updated on 14 January 2026 by TD ***
Forewing: 24-27mm
Last Recorded Year: September 2022
Last Recorded By – Steve Orridge
Last Recorded General Area – Buxton
Selected Images: Darley Dale, Derbyshire – Simon Roddis© and Buxton, Derbyshire – Steve Orridge©
Image Gallery
Distribution Map for Eurois occulta
Found 24 records
↳ from 2026+
↳ 1 from 2020 - 2025
↳ 23 from Before 2020
↳ from 2026+
↳ 1 from 2020 - 2025
↳ 23 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 – Eurois occulta
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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:
Eurois occulta
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Eurois occulta
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Eurois occulta
Adult-only & Anything [Larvae, Pupae, Adult, Mines]
Shading shows moth presence between dates
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Recordings By Year: Eurois occulta
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Eurois occulta
AGR: 0% | Total % Change: 0%
Hectad (10kmx10km) Coverage: Eurois occulta
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Eurois occulta
Eurois occulta
( 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 2020-2026.
Records Behind the Map and Charts - Eurois occulta – 24 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Ladycroft Ave, Buxton | SK07S | 02/09/2022 | 1 | adult | vc57_irecords_extract |
| Birch Vale | SK08I | 10/08/2017 | 1 | adult | vc57_irecords_extract |
| Lang Rd, Alvaston, Derby | SK33R | 05/07/2013 | 2 | Adult | vc57_danes_bc_data |
| Lang Rd, Alvaston, Derby | SK33R | 30/06/2013 | 1 | Adult | vc57_danes_bc_data |
| Lang Rd, Alvaston, Derby | SK33R | 25/06/2013 | 1 | Adult | vc57_danes_bc_data |
| Lang Rd, Alvaston, Derby | SK33R | 17/06/2013 | 1 | Adult | vc57_danes_bc_data |
| Repton (in garden) | SK32D | 25/07/2012 | 1 | Adult | vc57_danes_bc_data |
| Rose Av,Clowne | SK57D | 25/08/2010 | 1 | Adult | vc57_danes_bc_data |
| Rose Av,Clowne | SK57D | 15/08/2010 | 1 | Adult | vc57_danes_bc_data |
| The Hollies,Station Rd,Darley Dale | SK26R | 04/09/2007 | 1 | Adult | vc57_danes_bc_data |
| School Close,Parkway Gardens,Darley Dale | SK26R | 26/08/2007 | 1 | Adult | vc57_danes_bc_data |
| The Hollies,Station Rd,Darley Dale | SK26R | 24/08/2007 | 1 | Adult | vc57_danes_bc_data |
| School Close,Parkway Gardens,Darley Dale | SK26R | 24/08/2007 | 1 | Adult | vc57_danes_bc_data |
| The Hollies,Station Rd,Darley Dale | SK26R | 23/08/2007 | 1 | Adult | vc57_danes_bc_data |
| Far Cross,Cavendish Park,Matlock | SK36A | 08/08/1997 | 1 | Adult | vc57_danes_bc_data |
| Deerlands Rd, Ashgate, Chesterfield | SK37K | 01/09/1996 | 1 | Adult | vc57_danes_bc_data |
| Newbold Ave, Chesterfield | SK37R | 24/08/1957 | 1 | Adult | vc57_danes_bc_data |
| Langley Mill, Heanor (site not precise) | SK44N | 07/08/1939 | 1 | Adult | vc57_danes_bc_data |
| Repton (in garden) | SK32D | 25/07/1912 | 1 | Adult | vc57_danes_bc_data |
| Little Eaton, Derby (site not precise) | SK34Q | 01/01/1895 | 1 | Adult | vc57_danes_bc_data |
| Drakelow, Burton on Trent (site not precise) | SK21J | 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 | 01/01/1881 | 3 | Adult | vc57_danes_bc_data |
| Barrow on Trent, Derby (site not precise) | SK32P | 01/01/1800 | 1 | Adult | vc57_danes_bc_data |