Larval Case: C1 – Distinctive Species – 
– click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Uncertain/Unknown – Insufficient Data 
– Leaf Miner
– easy to identify, generally distinctive and unlikely to be confused with other species.ID pointers: A greyish-brown forewing with paler mottling and with indistinct bands. Several raised tufts across the wing.
Distribution: (Last record: 9 November 2025 at Markham Vale ) – Very few records of this species in VC57 & Derbyshire, despite being widely distributed in the British Isles in conifer plantations. An adult 27/6/2021. The leaf mines have been discovered at Markham Vale in Jan and Nov 2025
General Comment: None Mine Period Additional: Hibernates
Mine ID Difficulty:
– Care required in ID process as confusion with similar leaf mines. Quality photos of the mine required. Mine Type/s: Not Recorded
Mine Feeding Method/s: Spinning, Stem
Mine Comment: Feeds on the needles of Scots Pine, and sometimes on Larch and other pine species, during the autumn and spring. The larval stages involve a specific feeding pattern. First they mine internally within a single pine needle during the autumn. The larvae hibernates inside the mined needle. In the spring the larvae feeds on spun needles and shoots externally. At this stage the larvae can cause sufficient damage to be a serious pest in some areas.
*** Last updated on 12 November 2025 by TD ***
Last Recorded Year: 2025
Last Recorded By – Mark Radford
Last Recorded General Area – Markham Vale
Selected Images: Belper, Derbyshire – Dave Evans© / Markham Vale Jan 2025 – Mark Radford©
Image Gallery
Distribution Map for Exoteleia dodecella
Found 3 records
↳ 2 from After 2025
↳ 1 from 2020 - 2024
↳ 0 from Before 2020
↳ 2 from After 2025
↳ 1 from 2020 - 2024
↳ 0 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 – Exoteleia dodecella
⚠️ 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:
Exoteleia dodecella
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Exoteleia dodecella
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Exoteleia dodecella
Adult-only & Anything [Larvae, Pupae, Adult, Mines]
Shading shows moth presence between dates
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Recordings By Year: Exoteleia dodecella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Exoteleia dodecella
AGR: 0% | Total % Change: 0%
CUSUM Analysis: Exoteleia dodecella
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 24 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 2023, 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: Exoteleia dodecella
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Exoteleia dodecella
Exoteleia dodecella
( 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
Exoteleia dodecella
Exoteleia dodecella
( 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 - Exoteleia dodecella – 3 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Darwin Forest | SK26X | 01/07/2025 | 1 | adult | vc57_irecords_extract |
| Markham Vale North Tip | SK47L | 10/02/2025 | 1 | mine | vc57_irecords_extract |
| Belper | SK34N | 24/06/2023 | 1 | adult | vc57_irecords_extract |