– click for Adult Macro Verification Guidelines
– Rare / Uncommon / Scarce
– easy to identify, generally distinctive and unlikely to be confused with other species.ID pointers: Quite a distinctive moth. As the name suggests, there is a curved scalloped cross-line running through the outer forewing running into hindwing and another smaller curved cross-line near the wing base. A dark spot is located in between the two forewing cross-lines. The ground colour is a silver-grey but can be very variable.
Distribution: (Last record: 2023 ) – Last Recorded in 2023 – A scarce resident that is locally distributed in Derbyshire. Despite considerable areas of moorland in the north of the county, this moth is rarely seen and seems to favour the eastern moors. During the period 2019-2023 only four reports.
*** Last updated on 2 October 2025 by RP ***
Last Recorded Year: 2023
Last Recorded By – Not Recorded
Last Recorded General Area – Not Recorded
Selected Images: Derbyshire – Image by Simon Roddis © / Wildboar Clough, Longdendale, Derbyshire – Christian Heintzen ©
Image Gallery
Distribution Map for Dyscia fagaria
Found 32 records
↳ 3 from After 2025
↳ 5 from 2020 - 2024
↳ 24 from Before 2020
↳ 3 from After 2025
↳ 5 from 2020 - 2024
↳ 24 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 – Dyscia fagaria
⚠️ 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:
Dyscia fagaria
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Dyscia fagaria
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Dyscia fagaria
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: Dyscia fagaria
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Dyscia fagaria
AGR: 0% | Total % Change: 0%
CUSUM Analysis: Dyscia fagaria
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 18 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: Dyscia fagaria
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Dyscia fagaria
Dyscia fagaria
( 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 - Dyscia fagaria – 32 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Wardlow, Roost Barn | SK17X | 16/05/2025 | 1 | adult | vc57_irecords_extract |
| Derbyshire Wild Life Trust Long Clough | SK09G | 09/05/2025 | 1 | adult | vc57_irecords_extract |
| Glossop, Hague Street, Hay Meadow | SK09G | 21/05/2025 | 1 | adult | vc57_irecords_extract |
| Glossop, Black Moor at m | SK09Q | 14/07/2024 | 1 | adult | vc57_irecords_extract |
| Staveley Derbyshire | SK47H | 23/06/2023 | 1 | adult | vc57_irecords_extract |
| Glossop, Gnat Hole Rough Fields | SK09L | 02/06/2023 | 1 | adult | vc57_irecords_extract |
| Glossop, Moorfield, Wood's Cabin | SK09L | 22/05/2023 | 1 | adult | vc57_irecords_extract |
| Hathersage | SK28F | 26/06/2021 | 1 | adult | vc57_irecords_extract |
| Birch Vale | SK08I | 07/06/2018 | 1 | adult | vc57_irecords_extract |
| The Old Manse, Ault Hucknall, Glapwell | SK46S | 22/07/2013 | 1 | Adult | vc57_danes_bc_data |
| The Old Manse, Ault Hucknall, Glapwell | SK46S | 22/07/2013 | 1 | Adult | vc57_danes_bc_data |
| The Hollies,Station Rd,Darley Dale | SK26R | 08/06/2009 | 1 | Adult | vc57_danes_bc_data |
| Beeley Moor (Slagmill Plantation) | SK36E | 09/05/2007 | 1 | Adult | vc57_danes_bc_data |
| Beeley Moor (triangle), Beeley | SK26Y | 22/05/1990 | 3 | Adult | vc57_danes_bc_data |
| Beeley Moor (triangle), Beeley | SK26Y | 27/05/1990 | 2 | Adult | vc57_danes_bc_data |
| Beeley Triangle, Beeley Moor, Beeley | SK26Y | 27/05/1990 | 2 | Adult | vc57_danes_bc_data |
| Beeley Moor (triangle), Beeley | SK26Y | 22/05/1990 | 3 | Adult | vc57_danes_bc_data |
| Beeley Moor, Beeley (site not precies) | SK26Z | 03/07/1979 | 5 | Adult | vc57_danes_bc_data |
| Johnnygate, Barlow, Chesterfield | SK37C | 29/07/1979 | 1 | Adult | vc57_danes_bc_data |
| Johnnygate, Barlow, Chesterfield | SK37C | 29/07/1979 | 1 | Adult | vc57_danes_bc_data |
| Whitesprings, Hall Dale, Darley Dale (site not precise) | SK26R | 24/04/1976 | 1 | Larvae | vc57_danes_bc_data |
| Wragg's Quarry, Beeley Moor | SK26Y | 04/05/1971 | 1 | Larvae | vc57_danes_bc_data |
| Wragg's Quarry, Beeley Moor, Beeley | SK26Y | 04/05/1971 | 1 | Larvae | vc57_danes_bc_data |
| Beeley Moor, Beeley (site not precies) | SK26Z | 06/07/1969 | 1 | Adult | vc57_danes_bc_data |
| Wragg's Quarry,Rowsley Moor | SK26Y | 26/07/1969 | 1 | Adult | vc57_danes_bc_data |
| Beeley Moor, Beeley (site not precise) | SK26Z | 06/07/1969 | 1 | Adult | vc57_danes_bc_data |
| Wragg's Quarry, Beeley Moor, Beeley | SK26Y | 26/07/1969 | 1 | Adult | vc57_danes_bc_data |
| Slagmill Plantation (moors area) (site not precise) | SK26Z | 18/06/1960 | 1 | Adult | vc57_danes_bc_data |
| Wragg's Quarry,Rowsley Moor | SK26Y | 21/06/1958 | 1 | Adult | vc57_danes_bc_data |
| Wragg's Quarry, Beeley Moor, Beeley | SK26Y | 21/06/1958 | 1 | Adult | vc57_danes_bc_data |
| Wragg's Quarry,Rowsley Moor | SK26Y | 27/05/1958 | 1 | Adult | vc57_danes_bc_data |
| Wragg's Quarry, Beeley Moor, Beeley | SK26Y | 27/05/1958 | 1 | Adult | vc57_danes_bc_data |