15.012 BF290 – Maple Stilt – Caloptilia semifascia – (Haworth, 1828)
Adult Micro: CAT 2 – Can be confused with other species – Leaf-miner: CAT L – The leaf or a Photo required – 
– click for General Verification Guidelines | – click for Specific Verification Guidelines
– click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Rare / Uncommon / Scarce 
– Leaf-miner
– care required in the identification process, as confusion with similar species is likely – quality photographs required. Confusion Species: Caloptilia falconipennella (Dark Alder Stilt); Caloptilia honoratella (Pale Maple Stilt)
ID pointers: Another Caloptilia that is Orangey-brown or Orangey-yellow in colour with an angled light yellow streak from the leading edge of the forewing is a good indicator.
Distribution: (Last record: 14 August 2025 at Chaddesden ) – Uncertain due to lack of data – 1st VC57 leaf mine 10/7/2015 ; 2nd record Findern 6/9/2023 and one record in 2024 –One recorded 21/3/2025 from Allestree. Very localised due to restricted areas where Field Maple exists.
General Comment: None Mine Period Additional: The larvae create a gallery min in the leaf at first before then creating a leaf cone followed by a leaf roll – beware of feeding signs of C.Rufipennella on Sycamore which can be confusing.
Mine ID Difficulty: Not Recorded
Mine Type/s: Not Recorded
Mine Feeding Method/s: Not Recorded
Mine Comment: None.
*** Last updated on 1 November 2025 by TD ***
Last Recorded Year: 2025
Last Recorded By – Martin Roome
Last Recorded General Area – Chaddesden
Selected Images:
Bamford – July 2015 – Andrew Watchorn© / Allestree (March 2025)Stephen Plant©/ Chaddesden 14/8/25 – Martin Roome©
Image Gallery
Temporal Distribution Chart
Adults: (between 2023 - 2025) | Immatures: (between 2006 - 2015)
(click legend below to show/hide datasets)
Distribution Map for Caloptilia semifascia
Found 10 records
↳ from 2026+
↳ 7 from 2020 - 2025
↳ 3 from Before 2020
↳ from 2026+
↳ 7 from 2020 - 2025
↳ 3 from Before 2020
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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 semifascia
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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 semifascia
( data includes both Larvae and Adult Stages )
Monthly Counts By Year:
Caloptilia semifascia
( data is based on 'Adult' stage records only )
First/Last Recorded Dates: Caloptilia semifascia
Adult-only & Anything [Larvae, Pupae, Adult, Mines]
Shading shows moth presence between dates
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Recordings By Year: Caloptilia semifascia
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Caloptilia semifascia
AGR: 0.96% | Total % Change: 20%
Hectad (10kmx10km) Coverage: Caloptilia semifascia
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Caloptilia semifascia
Caloptilia semifascia
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 2020-2026.
Mine Periods – Indicative –vs– Recorded Data
Caloptilia semifascia
Caloptilia semifascia
( 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 2020-2026.
Records Behind the Map and Charts - Caloptilia semifascia – 10 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Recorder | Source | RecordKey |
|---|---|---|---|---|---|---|---|
| Waingroves Community Woodland | SK44E | 16/08/2025 | 2 | adult | Milnes, Emily | vc57_irecords_extract | iBRC48440085 |
| Chaddesden, Derby | SK33T | 14/08/2025 | 1 | adult | roome, martin | vc57_irecords_extract | iBRC44572094 |
| Allestree, Derby | SK33P | 01/05/2025 | 1 | adult | Plant, Stephen | vc57_irecords_extract | iBRC41298576 |
| Allestree, Derby | SK33P | 21/03/2025 | 1 | adult | Plant, Stephen | vc57_irecords_extract | iBRC40490765 |
| Midway, Derbys. | SK32A | 20/03/2025 | 1 | adult | Williams, Michael | vc57_irecords_extract | iBRC40484864 |
| Sandiacre | SK43S | 02/07/2024 | 2 | adult | paul buxton | vc57_irecords_extract | iBRC36986082 |
| Findern Garden | SK33A | 06/09/2023 | 1 | Adult | Hallam, Brian | vc57_irecords_extract | iBRC34638295 |
| Bamford, Win Hill and Thornhill Trail | SK28B | 10/07/2015 | 1 | Larva | Watchorn, Andrew | vc57_irecords_extract | iBRC18226279 |
| Ladybower Resr | SK18U | 03/09/2010 | 1 | Larval Mine | S.H. Hind | vc57_danes_bc_data | LC000334001COXJ8 |
| Carr Vale NR,Bolsover | SK47K | 13/09/2006 | 1 | Larval Mine | S.H. Hind | vc57_danes_bc_data | LC000334001CP3MT |