15.003 BF281  –  Gracillariidae –  Gracillariinae – Caloptilia populetorum – Black-dot Stilt – (Zeller, 1839) Adult Micro:  CAT 2 – Confusion Species –       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
Green –  Rare / Uncommon / Scarce        purple – Leaf Miner
Taxonomy:   Micro   >>  Gracillariidae  >> Gracillariinae
Other Name/s: Clouded Slender
ID Difficulty:  Red – difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required.
ID pointers: A characteristic resting pose, with the body raised on the front legs. The forewing can be pale yellowish brown through to darkish brown. The paler specimens (like this one) have a distinctive blackish spot along the costa about half way and two more at the wing tip with dark cilia.
Distribution:  (First record: 10 July 2010 at Kings Newton )  –  (Last record: 17 July 2024 at Belper )  –  Not listed in Harrison & Sterling (1988) – The current status in Derbyshire is unknown due to insufficient data. A species that seems to be expanding its range. First documented record 10/7/2010 Kings Newton. Very few records since.
Flight Period: January /  February /  March /  April /  May /  August /  September /  October /  November /  –  On the wing from August onwards. They overwinter, so can then be seen until April – May Mine Period: July /  August /  September /   – The larvae mine and feed on birch later rolling a leaf and living within. Photographed: Yes –  Photographed By: Tony Davison, Dave Evans  © All Rights Reserved
*** Last updated on 6 May 2025 by RP ***
Wingspan: 11-14mm
Food Plant: Birch
First Recorded Year: 2010
Last Recorded By – Dave Evans
Last Recorded General Area – Belper

IMAGES BELOW:  Melbourne, Derbyshire – Tony Davison © / Belper – Dave Evans ©

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Distribution Map for Caloptilia populetorum

Found 10 records
    ↳ 2 from After 2025
    ↳ 4 from 2020 - 2024
    ↳ 4 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.

******* Choose ONLY one at a time, of either Monad, Tetrad or Hectad Distribution - each has it's own set of data. Also, the distribution maps cover ALL recorded data. *******

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.

Land-cover * shows the variety of land-cover within the VC57 area, based on the CORINE (Coordination of Information on the Environment) forty-four thematic classes of land-cover. This will show, to a greater or lesser degree, the number and variety of moths found in different land-cover types. The UK continues to operate within the Copernicus programme, with the UK Centre for Ecology & Hydrology (UKCEH) providing Corine Land Cover (CLC) datasets for the UK and its territories.


NBN Atlas UK Distribution for – Caloptilia populetorum

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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 populetorum
( data includes both Larvae and Adult Stages )

Monthly Counts By Year: Caloptilia populetorum
( data is based on 'Adult' stage records only. )


First/Last Recorded Dates: Caloptilia populetorum
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 populetorum
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Caloptilia populetorum
AGR: 0%   |   Total % Change: 0%


CUSUM Analysis: Caloptilia populetorum
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 7 (July) 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 2024, 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 populetorum
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Caloptilia populetorum
( 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 populetorum
( 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 populetorum – 10 records available

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

TaxonSite NameTetradYearDateCountStageSource
Caloptilia populetorumDerby DESK33I202511/08/20251adultvc57_irecords_extract
Caloptilia populetorumMidway, Derbys.SK32A202520/03/20251adultvc57_irecords_extract
Caloptilia populetorumBelperSK34N202417/07/20241adultvc57_irecords_extract
Caloptilia populetorumBlacka Moor and PlantationSK28V202009/08/20201pre-adultvc57_irecords_extract
Caloptilia populetorumMelbourne, DerbyshireSK32X202007/08/20201adultvc57_irecords_extract
Caloptilia populetorumMidway, Derbys.SK32A202030/07/20201adultvc57_irecords_extract
Caloptilia populetorumLong Eaton - Marlborough RoadSK43X201602/04/20161Adultvc57_irecords_extract
Caloptilia populetorumRamsley Moor and ReservoirSK27X201526/05/20151pre-adultvc57_irecords_extract
Caloptilia populetorumMain Street, Kings NewtonSK32Y201010/07/20101Adultvc57_irecords_extract
Caloptilia populetorumEdgecote Drive,Newhall,SwadlincoteSK22V200617/10/20061Adultvc57_danes_bc_data

 
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