– click for Adult Macro Verification Guidelines
– Significant Record / Very Rare / Vagrant
– care required in the identification process, as confusion with similar species is likely – quality photographs required. ID pointers: Distinguished from all similar species by the broad and rounded forewing and the faint scalloping on both the fringes for the forewing and hind-wing.
Distribution: (Last record: 30 June 2025 at Darwin Forest, Matlock ) – Very rare and few records in a year. Last recorded in Derbyshire in 2023 – In 1986 it was thought to be extinct in Derbyshire, but since then there were a number of records in the 1990’s. and it continues to be recorded in small numbers each year. One trapped in Grinlow Woods, Buxton on 10th July 2021. Latest records of 4 in 2023, a daytime observation, in a small plantation at Fernilee Reservoir, a specimen trapped in a garden trap at Cromford and 2 recorded from a garden on 2 seperate dates from Buxton. One from Darwin Forest, Matlock 30/6/2025. Remains a rare species in the county.
*** Last updated on 2 October 2025 by RP ***
Forewing: 18-26mm
Last Recorded Year: 2025
Last Recorded By – Dave Evans
Last Recorded General Area – Darwin Forest, Matlock
Selected Images: Photo by kind permission of ©Rowan Wakefield© – Grinlow Woods, Buxton 10/07/2021 / Darwin Forest 30/6/2025 – Dave Evans©
Image Gallery
Distribution Map for Deileptenia ribeata
Found 38 records
↳ 6 from After 2025
↳ 9 from 2020 - 2024
↳ 23 from Before 2020
↳ 6 from After 2025
↳ 9 from 2020 - 2024
↳ 23 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 – Deileptenia ribeata
⚠️ 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:
Deileptenia ribeata
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Deileptenia ribeata
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Deileptenia ribeata
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: Deileptenia ribeata
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Deileptenia ribeata
AGR: 5.9% | Total % Change: 233.3%
CUSUM Analysis: Deileptenia ribeata
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 15 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 2006, 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: Deileptenia ribeata
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Deileptenia ribeata
Deileptenia ribeata
( 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 - Deileptenia ribeata – 38 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Darwin Forest | SK26X | 02/07/2025 | 1 | adult | vc57_irecords_extract |
| Darwin Forest | SK26X | 03/07/2025 | 6 | adult | vc57_irecords_extract |
| Darwin Forest | SK26X | 04/07/2025 | 4 | adult | vc57_irecords_extract |
| Darwin Forest | SK26X | 05/07/2025 | 4 | adult | vc57_irecords_extract |
| Darwin Forest | SK26X | 06/07/2025 | 2 | adult | vc57_irecords_extract |
| Darwin Forest | SK26X | 30/06/2025 | 3 | adult | vc57_irecords_extract |
| Hathersage | SK28F | 19/07/2024 | 1 | adult | vc57_irecords_extract |
| Garden, Walton | SK36U | 27/06/2024 | 1 | adult | vc57_irecords_extract |
| Lower Cromford Garden | SK25Y | 24/07/2023 | 1 | adult | vc57_irecords_extract |
| Ladycroft Ave, Buxton | SK07S | 21/07/2023 | 1 | adult | vc57_irecords_extract |
| Ladycroft Ave, Buxton | SK07S | 28/07/2023 | 1 | adult | vc57_irecords_extract |
| Chatsworth | SK27K | 11/07/2023 | 1 | adult | vc57_irecords_extract |
| Derbyshire, UK | SK07L | 09/07/2021 | 1 | Adult | vc57_irecords_extract |
| Grin Plantation, Buxton | SK07L | 09/07/2021 | 1 | adult | vc57_irecords_extract |
| Hathersage, Derbyshire, UK | SK28F | 29/06/2021 | 1 | adult | vc57_irecords_extract |
| Firestone Lane, Matlock | SK36G | 25/07/2014 | 2 | adult | vc57_irecords_extract |
| Repton (The Croft garden) | SK32D | 06/07/2011 | 1 | Adult | vc57_danes_bc_data |
| School Close,Parkway Gardens,Darley Dale | SK26R | 25/06/2011 | 1 | Adult | vc57_danes_bc_data |
| Flash Lane,Beeley Moor | SK26X | 07/08/2009 | 5 | Adult | vc57_danes_bc_data |
| Dronfield Woodhouse | SK37J | 26/07/2009 | 1 | adult | vc57_irecords_extract |
| Back Lane,Glapwell | SK46T | 30/06/2009 | 1 | Adult | vc57_danes_bc_data |
| Back Lane, Glapwell | SK46T | 30/06/2009 | 1 | Adult | vc57_danes_bc_data |
| Far Cross,Cavendish Park,Matlock | SK36A | 25/07/2008 | 1 | Adult | vc57_danes_bc_data |
| Flash Lane,Beeley Moor | SK26X | 16/07/2006 | 7 | Adult | vc57_danes_bc_data |
| Alport Dale, nr Ladybower Resr | SK18P | 18/07/2005 | 2 | Adult | vc57_danes_bc_data |
| Flash Lane,Beeley Moor (site not precise) | SK26Z | 13/07/2004 | 1 | Adult | vc57_danes_bc_data |
| Flash Lane,Beeley Moor | SK26X | 09/07/1999 | 1 | Adult | vc57_danes_bc_data |
| Flash Lane,Beeley Moor | SK26X | 22/05/1998 | 1 | Adult | vc57_danes_bc_data |
| Flash Lane,Beeley Moor (site not precise) | SK26Z | 05/08/1996 | 1 | Adult | vc57_danes_bc_data |
| Flash Lane,Beeley Moor | SK26X | 05/08/1996 | 20 | Adult | vc57_danes_bc_data |
| Flash Lane, Beeley Moor, Beeley (site not precise) | SK26Z | 05/08/1996 | 1 | Adult | vc57_danes_bc_data |
| Repton (site not precise) | SK32B | 13/08/1941 | 1 | Adult | vc57_danes_bc_data |
| Repton (in a belt of pines) (site not precise) | SK32B | 01/07/1937 | 2 | Adult | vc57_danes_bc_data |
| Repton Shrubs, Repton | SK32B | 01/07/1936 | 1 | Adult | vc57_danes_bc_data |
| Repton Shrubs, Repton | SK32B | 22/07/1935 | 6 | Adult | vc57_danes_bc_data |
| Repton Shrubs, Repton | SK32B | 10/07/1933 | 1 | Adult | vc57_danes_bc_data |
| Repton Shrubs, Repton | SK32B | 16/07/1932 | 1 | Adult | vc57_danes_bc_data |
| Repton (The Croft garden) | SK32D | 06/07/1911 | 1 | Adult | vc57_danes_bc_data |