Leaf-miner: CAT L – The leaf or a Photo required – 
– click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Uncertain/Unknown – Insufficient Data 
– Leaf Miner
– difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required.Confusion Species: Heliozela sericiella, Heliozela resplendella
ID pointers: No information at this time
Distribution: (Last record: 18 August 2022 at Ringinglow ) – Uncertain as insufficient data – 13 records prior to 2010 – Leaf Mine records in good numbers from two sites in 2018 & 2022 – likely to be locally common in Birch woodland
General Comment: None Mine Period Additional: The larva mines the leaves of birch in July & August, preferring young trees, and begins its life inside a twig, as it grows, it eventually enters a leaf, forming a gallery mine before cutting out an oval case in which to pupate.
Mine ID Difficulty: Not Recorded
Mine Type/s: Not Recorded
Mine Feeding Method/s: Not Recorded
Mine Comment: None.
*** Last updated on 2 October 2025 by RP ***
Last Recorded Year: 2022
Last Recorded By – Andrew Watchorn
Last Recorded General Area – Ringinglow
Selected Images:
Ringinglow – 18/8/2022 – Andrew Watchorn© / Rose End Meadows (2009) Steve Orridge©
Image Gallery
Distribution Map for Heliozela hammoniella
Found 10 records
↳ 0 from After 2025
↳ 1 from 2020 - 2024
↳ 9 from Before 2020
↳ 0 from After 2025
↳ 1 from 2020 - 2024
↳ 9 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 – Heliozela hammoniella
⚠️ 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:
Heliozela hammoniella
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Heliozela hammoniella
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Heliozela hammoniella
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: Heliozela hammoniella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Heliozela hammoniella
AGR: 27.5% | Total % Change: 2900%
CUSUM Analysis: Heliozela hammoniella
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 22 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 2022, reaching above average levels. The lowest population point occurred near 2010, 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: Heliozela hammoniella
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Heliozela hammoniella
Heliozela hammoniella
( 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
Heliozela hammoniella
Heliozela hammoniella
( 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 - Heliozela hammoniella – 10 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Lady Canning's Plantation | SK28W | 18/08/2022 | 30 | mine (empty) | vc57_irecords_extract |
| Ramsley Moor and Reservoir | SK27X | 07/08/2017 | 1 | pre-adult | vc57_irecords_extract |
| Ladybower Resr | SK18U | 03/09/2010 | 1 | Larval Mine | vc57_danes_bc_data |
| Howden Resr | SK19S | 25/08/2010 | 1 | Larval Mine | vc57_danes_bc_data |
| Slippery Stones,Upper Derwent | SK19S | 25/08/2010 | 1 | Larval Mine | vc57_danes_bc_data |
| Padley Gorge, Nether Padley | SK27P | 19/08/2010 | 1 | Larval Mine | vc57_danes_bc_data |
| Cromford, Matlock DE, UK | SK25Y | 16/10/2009 | 1 | Larva | vc57_irecords_extract |
| Rose End Meadow | SK25Y | 16/10/2009 | 1 | mine | vc57_irecords_extract |
| Hopton Wood NR, Cromford | SK25T | 16/10/2009 | 1 | Larval Mine | vc57_danes_bc_data |
| Monsall Trail, Buxton | SK17L | 14/09/2008 | 1 | Larval Mine | vc57_danes_bc_data |