49.153 BF1096  –  Tortricidae –  Olethreutinae – Apotomis sauciana – Least Marble – (Frölich, 1828) Adult Micro:  CAT 2 – Confusion Species –       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Green –  Rare / Uncommon / Scarce   
Taxonomy:   Micro   >>  Tortricidae  >> Olethreutinae
Other Name/s: Bilberry Marble
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species:  A.capreana Endothenia gentianaeana
ID pointers: The basal two thirds of the forewing are blackish – brown, mixed black & grey. The final third leading to the outer wing and apex is a creamy white and the final outer margin leading to the apex and termen is a make-up of browns, blacks and greys bordering the creamy white band. There is  a “Hook-like indentation extending into the black area from the creamy white band.
Distribution:  (Last record: 15 July 2024 at Bray Clough )  –  Old records indicate that this species was widespread and often common across the Bilberry covered moorland areas of North Derbyshire. There are five modern day records between 2006 – 2024. The latest was netted at Bray Clough on 15th July 2024 by Christian Heintzen.
Flight Period: June /  July /  August /  –  On the wing during June – August. Moth Activity: Nocturnal  Crepuscular   – sometimes seen during the day Photographed: Yes –  Photographed By: Christian Heintzen  © All Rights Reserved
*** Last updated on 8 July 2025 by TD ***
Wingspan: 13-16mm
Food Plant: Bilberry (Vaccinium myrtillus).
Last Recorded Year: 2024
Last Recorded By – Christian Heintzen
Last Recorded General Area – Bray Clough

IMAGES BELOW:  Bray Clough, Derbyshire – Christian Heintzen© 

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Distribution Map for Apotomis sauciana

Found 5 records
    ↳ 0 from After 2025
    ↳ 3 from 2020 - 2024
    ↳ 2 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 – Apotomis sauciana

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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: Apotomis sauciana
( data includes both Larvae and Adult Stages )

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


First/Last Recorded Dates: Apotomis sauciana
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: Apotomis sauciana
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Apotomis sauciana
AGR: -3.78%   |   Total % Change: -50%


CUSUM Analysis: Apotomis sauciana
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 22 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 2006, 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: Apotomis sauciana
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Apotomis sauciana
( 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.

Records Behind the Map and Charts - Apotomis sauciana – 5 records available

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

TaxonSite NameTetradYearDateCountStageSource
Apotomis saucianaBray CloughSK09K202415/07/20241adultvc57_irecords_extract
Apotomis saucianaLUDWORTH MOORSK08E202008/07/20202adultvc57_irecords_extract
Apotomis saucianaBirch ValeSK08I202012/07/20201adultvc57_irecords_extract
Apotomis saucianaBirch ValeSK08I201809/07/20181adultvc57_irecords_extract
Apotomis saucianaFlash Lane,Beeley MoorSK26X200616/07/20062Adultvc57_danes_bc_data

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