15.009 BF287  –  Gracillariidae –  Gracillariinae – Caloptilia robustella – Shaded Oak Stilt – (Jäckh, 1972) Adult Micro:  CAT 4 – Dissection required – Gen-Det-Reqd       Leaf-miner:  CAT R – Moth will need to be reared and possibly dissected – reared and possibly dissected       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Brown –  Significant Record / Very Rare / Vagrant         purple – Leaf Miner
Taxonomy:   Micro   >>  Gracillariidae  >> Gracillariinae
Other Name/s: New Oak Slender
ID Difficulty:  Red – 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
Flight Period: April /  May /  June /  July /  August /  September –  Two generations – April – June and July – Sept Mine Period:  May /  June /  September /  October
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.
Moth Activity: Nocturnal   – and is attracted to light Photographed: No –  Photographed By: Not Recorded
*** Last updated on 2 October 2025 by RP ***
Wingspan: 10-13mm
Food Plant: Oak
Last Recorded Year: 2020
First Recorded Year: 2001
Last Recorded By – Brian & Jean Hallam
Last Recorded General Area – Findern

Selected Images:  



Distribution Map for Caloptilia robustella

Found 6 records
    ↳ from 2026+
    ↳ 1 from 2020 - 2025
    ↳ 5 from Before 2020
Flying
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Mining
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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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.

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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

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Recordings By Year: Caloptilia robustella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Caloptilia robustella
AGR: 0%   |   Total % Change: 0%

Hectad (10kmx10km) Coverage: Caloptilia robustella
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
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 2020-2026.

Mine Periods – Indicative –vs– Recorded Data
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 2020-2026.

Records Behind the Map and Charts - Caloptilia robustella – 6 records available

Listed by Year - descending - scroll across to see all table columns

Site NameTetradDateCountStageSource
Derby DESK33I13/06/20251adultvc57_irecords_extract
Wood Lane,Newhall,SwadlincoteSK22V03/06/20161Adultvc57_danes_bc_data
Lancaster Ave,SandiacreSK43S26/07/20131Adultvc57_danes_bc_data
Far Cross,Cavendish Park,MatlockSK36A07/08/20071Adultvc57_danes_bc_data
Wood Lane,Newhall,SwadlincoteSK22V30/07/20041Adultvc57_danes_bc_data
Abbotsholme School, RocesterSK13E04/10/20011Larval Minevc57_danes_bc_data

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