49.086 BF1051  –  Tortricidae –  Tortricinae – Acleris logiana – Pale Birch Tortrix – (Clerck, 1759) Adult Micro:  CAT 2 – Confusion Species –       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Black – Uncertain/Unknown – Insufficient Data   
Taxonomy:   Micro   >>  Tortricidae  >> Tortricinae
Other Name/s: Grey Birch Button
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
ID pointers: A fairly distinctive species. The forewing colour is a powdered white or greyish-white, variably speckled with small blackish scale tufts and pale creamy brown diagonal cross-lines. One form has two blackish triangular-like patches on the costa.
Distribution:  (First record: 3 November 2023 at Glossop, Long Clough )  –  (Last record: 25 November 2024 at Long Clough )  –  These are the first accepted and confirmed records for VC57. A species which only reached Yorkshire in 2010. The first was recorded at Long Clough, Glossop on 3rd November 2023 and the second was from Wildboar Clough, Longdendale on 16th November 2023. A further sspecimen was taken at Long Clough on 25/11/2024 with all three records by Christian Heintzen. Status in Derbyshire is unknown but obviously a small population exists in the Glossop area of the county.
Flight Period: January /  February /  March /  April /  June /  July /  September /  October /  November /  December /  –  On the wing during Jun – July and September – April Moth Activity: Nocturnal  Photographed: Yes –  Photographed By: Christian Heintzen  © All Rights Reserved
*** Last updated on 26 July 2025 by TD ***
Wingspan: 18-22mm
Food Plant: Birch (Betula).
Last Recorded Year: 2024
First Recorded Year: 2023
Last Recorded By – Christian Heintzen
Last Recorded General Area – Long Clough

IMAGES BELOW:  1st VC57 record – Long Clough, Glossop – 3rd November 2023 & Wildboar Clough, Longdendale, – 16th November 2023 – Christian Heintzen© – 25th November 2024 – Long Clough -Christian Heintzen

Distribution Map for Acleris logiana

Found 7 records
    ↳ 1 from After 2025
    ↳ 6 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 – Acleris logiana

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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: Acleris logiana
( data includes both Larvae and Adult Stages )

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


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


CUSUM Analysis: Acleris logiana
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 23 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: Acleris logiana
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Acleris logiana
( 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 - Acleris logiana – 7 records available

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

TaxonSite NameTetradYearDateCountStageSource
Acleris logianaDerbyshire Wild Life Trust Long CloughSK09G202524/04/20251adultvc57_irecords_extract
Acleris logianaDerbyshire Wild Life Trust Long CloughSK09G202424/11/20241adultvc57_irecords_extract
Acleris logianaSandiacre GardenSK43T202425/06/20241adultvc57_irecords_extract
Acleris logianaDerbyshire Wild Life Trust Long CloughSK09G202409/03/20241adultvc57_irecords_extract
Acleris logianaLongdendale, Wildboar CloughSK09U202415/02/20241adultvc57_irecords_extract
Acleris logianaDerbyshire Wild Life Trust Long CloughSK09G202303/11/20231adultvc57_irecords_extract
Acleris logianaLongdendale, Wildboar CloughSK09U202316/11/20231adultvc57_irecords_extract

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