Leaf-miner: CAT R – Moth will need to be reared and possibly dissected – 
– click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Significant Record / Very Rare / Vagrant 
– Leaf Miner
– difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required. ID pointers: Very similar to C. alchimiella, shorter and less clearly defined yellow blotch on the forewing. Only reliably separated by dissection.
Distribution: (First record: 4 October 2001 ) – (Last record: 9 May 2020 at Findern ) – 1st county record 4th Oct 2001 – very few records. This species needs to be recorded as aggregate Caloptilia alchimiella/robustella if uncertain.
General Comment: None Mine Period Additional: Short gallery becoming a blotch. Later in up to three cones at the edge of the leaf.
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: 2020
First Recorded Year: 2001
Last Recorded By – Brian & Jean Hallam
Last Recorded General Area – Findern
Selected Images:
Image Gallery
No gallery images found for this moth.
Distribution Map for Caloptilia robustella
Found 7 records
↳ 2 from After 2025
↳ 0 from 2020 - 2024
↳ 5 from Before 2020
↳ 2 from After 2025
↳ 0 from 2020 - 2024
↳ 5 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 – Caloptilia robustella
⚠️ 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:
Caloptilia robustella
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Caloptilia robustella
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Caloptilia robustella
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: Caloptilia robustella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Caloptilia robustella
AGR: 0% | Total % Change: 0%
CUSUM Analysis: Caloptilia robustella
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 20 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 2016, 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: Caloptilia robustella
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Caloptilia robustella
Caloptilia robustella
( 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
Caloptilia robustella
Caloptilia robustella
( 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 - Caloptilia robustella – 7 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Melbourne, Derbyshire | SK32X | 13/07/2025 | 1 | adult | vc57_irecords_extract |
| Derby DE | SK33I | 13/06/2025 | 1 | adult | vc57_irecords_extract |
| Wood Lane,Newhall,Swadlincote | SK22V | 03/06/2016 | 1 | Adult | vc57_danes_bc_data |
| Lancaster Ave,Sandiacre | SK43S | 26/07/2013 | 1 | Adult | vc57_danes_bc_data |
| Far Cross,Cavendish Park,Matlock | SK36A | 07/08/2007 | 1 | Adult | vc57_danes_bc_data |
| Wood Lane,Newhall,Swadlincote | SK22V | 30/07/2004 | 1 | Adult | vc57_danes_bc_data |
| Abbotsholme School, Rocester | SK13E | 04/10/2001 | 1 | Larval Mine | vc57_danes_bc_data |