– click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Uncertain/Unknown – Insufficient Data 
– Leaf Miner
– care required in the identification process, as confusion with similar species is likely – quality photographs required. Confusion Species: Phyllonorycter schreberella (Shining Elm Leaf-miner); Phyllonorycter stettinensis (Lesser Alder Leaf-miner)
ID pointers: None at this time
Distribution: (Last record: 26 October 2025 at Markham Vale North Tip ) – Uncertain as so few records, all of which are of the leaf mines. Five records between 2008 – 2023
Leaf Mine at Norton Lees August 2025; Markham Vale Oct 2025
General Comment: None Mine Period Additional: A long, narrow and tubular mine blotch mine on underside of Elm leaves, between two veins
Mine ID Difficulty: Not Recorded
Mine Type/s: Not Recorded
Mine Feeding Method/s: Not Recorded
Mine Comment: None.
*** Last updated on 27 October 2025 by TD ***
Last Recorded Year: 2025
Last Recorded By – Mark Radford
Last Recorded General Area – Markham Vale North Tip
Selected Images:
Coombs Dale – July 2018 – Andrew Watchorn© / Norton Lees – Pete Mella© / Markham Vale Oct 2025 – Mark Radford©
Image Gallery
Distribution Map for Phyllonorycter tristrigella
Found 24 records
↳ 6 from After 2025
↳ 1 from 2020 - 2024
↳ 17 from Before 2020
↳ 6 from After 2025
↳ 1 from 2020 - 2024
↳ 17 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 – Phyllonorycter tristrigella
⚠️ 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:
Phyllonorycter tristrigella
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Phyllonorycter tristrigella
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Phyllonorycter tristrigella
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: Phyllonorycter tristrigella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Phyllonorycter tristrigella
AGR: 9.91% | Total % Change: 866.7%
CUSUM Analysis: Phyllonorycter tristrigella
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 16 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 9 (September) 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: Phyllonorycter tristrigella
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Phyllonorycter tristrigella
Phyllonorycter tristrigella
( 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.
Mine Periods – Indicative –vs– Recorded Data
Phyllonorycter tristrigella
Phyllonorycter tristrigella
( data includes both Larvae and Adult Stages )
Mine 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 mine periods [month/s]. The coloured lines represent the actual months seen mining, from site observation records received between 2020-2025.
Records Behind the Map and Charts - Phyllonorycter tristrigella – 24 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Markham Vale North Tip | SK47L | 26/10/2025 | 50 | mine | vc57_irecords_extract |
| Jim Mart Nature Reserve | SK36S | 01/09/2025 | 1 | mine | vc57_irecords_extract |
| Griffe Field Park, Littleover | SK33G | 30/08/2025 | 1 | mine | vc57_irecords_extract |
| Meersbrook Park | SK38M | 22/08/2025 | 1 | mine | vc57_irecords_extract |
| DWT Wyver Lane | SK34P | 13/08/2025 | 3 | mine (empty) | vc57_irecords_extract |
| DWT Wyver Lane | SK34P | 06/08/2025 | 2 | mine (empty) | vc57_irecords_extract |
| Burton upon Trent | SK32P | 05/11/2024 | 1 | Mine | vc57_irecords_extract |
| Wilson | SK32X | 13/09/2019 | 2 | Adult | vc57_irecords_extract |
| Grange Wood | SK21S | 13/09/2018 | 1 | Mine | vc57_irecords_extract |
| Coombs Dale, Calver | SK27H | 30/07/2018 | 1 | pre-adult | vc57_irecords_extract |
| Waggon Lane, Newhall, Swadlincote | SK22V | 14/07/2014 | 1 | Larval Mine | vc57_danes_bc_data |
| Newhall (Waggon Lane), Swadlincote | SK22V | 10/11/2010 | 1 | Larval Mine | vc57_danes_bc_data |
| Thorpe, Dovedale | SK15K | 13/10/2010 | 1 | Larval Mine | vc57_danes_bc_data |
| Ashford in the Water | SK16Z | 22/09/2010 | 1 | Larval Mine | vc57_danes_bc_data |
| Ashford in the Water | SK16Z | 22/09/2010 | 1 | Larval Mine | vc57_danes_bc_data |
| Rose End Meadows NR,Cromford | SK25Y | 16/10/2009 | 1 | Larval Mine | vc57_danes_bc_data |
| Linacre | SK37L | 13/10/2009 | 1 | Larval Mine | vc57_danes_bc_data |
| Stoney Middleton | SK27H | 12/10/2009 | 1 | Larval Mine | vc57_danes_bc_data |
| Norbury | SK14G | 01/10/2009 | 1 | Larval Mine | vc57_danes_bc_data |
| Broomfield Hall, Morley, Derby | SK34V | 08/11/2008 | 1 | Larval Mine | vc57_danes_bc_data |
| Calke Park | SK32L | 25/10/2008 | 1 | Mine | vc57_irecords_extract |
| Calke Park,Ticknall | SK32R | 25/10/2008 | 1 | Larval Mine | vc57_danes_bc_data |
| Hillclifflane, nr Idridgehay | SK24Y | 02/11/2002 | 1 | Larval Mine | vc57_danes_bc_data |
| Abbotsholme School, Rocester | SK13E | 04/10/2001 | 1 | Larval Mine | vc57_danes_bc_data |