15.017 BF296  –  Gracillariidae –  Gracillariinae – Calybites phasianipennella – White-marked Stilt – (Hübner, [1813]) Adult Micro:  CAT 2 – Confusion Species –       Leaf-miner:  CAT L – The leaf or a Photo required – 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: Little Slender
ID Difficulty:  Red – difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required.
ID pointers: There are two forms, this one that shows four large creamy or whitish markings and the typical one that is more golden brown with a large pale dorsal streak.
Distribution:  (First record: 13 August 2019 at Grassmoor )  –  (Last record: 13 March 2024 at Kings Newton )  –  The 2nd record for Derbys was trapped in Quarndon on 20/21 August 2020 by Dan Brown. There is one record from the Rothamsted trap at Grassmoor  on the 13/08/2019. It occurs locally in England. A further account was from Kings Newton on 13/3/2024.
Flight Period: January /  February /  March /  April /  May /  July /  August /  September /  October /  November /  December /  –  On the wing during July – Aug then September when it overwinters as an adult and can then be seen again during April and May. Mine Period: July /  August /  September /   – A gallery is formed which turns into a blotch, then later two conical leaf-edge rolls Photographed: Yes –  Photographed By: Dan Brown  © All Rights Reserved
*** Last updated on 17 July 2025 by TD ***
Wingspan: 10-11mm
Food Plant: Dock (Rumex), knotgrass (Polygonum) and loosestrife (Lysimachia).
Last Recorded Year: 2024
First Recorded Year: 2019
Last Recorded By – Will Soar
Last Recorded General Area – Kings Newton

IMAGES BELOW:  Quarndon, Derbyshire – Dan Brown ©

 
 

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Distribution Map for Calybites phasianipennella

Found 2 records
    ↳ 0 from After 2025
    ↳ 2 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.

******* 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 – Calybites phasianipennella

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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: Calybites phasianipennella
( data includes both Larvae and Adult Stages )

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


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


CUSUM Analysis: Calybites phasianipennella
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 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 2023, 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: Calybites phasianipennella
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Calybites phasianipennella
( 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
Calybites phasianipennella
( 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 - Calybites phasianipennella – 2 records available

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

TaxonSite NameTetradYearDateCountStageSource
Calybites phasianipennellaKing's NewtonSK32Y202413/03/20241adultvc57_irecords_extract
Calybites phasianipennellaFindern GardenSK33A202318/08/20231Adultvc57_irecords_extract

 
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