49.061 BF1037  –  Tortricidae –  Tortricinae – Acleris holmiana – White-marked Tortrix – (Linnaeus, 1758) Adult Micro:  CAT 1 – Distinctive Species –       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Green –  Rare / Uncommon / Scarce   
Taxonomy:   Micro   >>  Tortricidae  >> Tortricinae
Other Name/s: White-triangle Button
ID Difficulty:  green  – easy to identify, generally distinctive and unlikely to be confused with other species.
ID pointers: Quite distinctive. The characteristic feature are the white triangular flashes along the costa at about two thirds. Forewing is a yellowish brown shaded reddish.
Distribution:  (First record: 1 August 1975 at Burton-on-Trent )  –  (Last record: 1 July 2025 at Shirland )  –  First record for the VC appears to be from 1975 with a further 15 records since. Assume its an uncommon species in the county. One recorded1/7/2025 from Shirland.
Flight Period: July /  August /  –  On the wing during July – August. Moth Activity: Nocturnal   – but can be disturbed during the day Photographed: Yes –  Photographed By: Will Soar  © All Rights Reserved
*** Last updated on 2 October 2025 by RP ***
Wingspan: 13mm
Food Plant: Hawthorn (Crataegus), rose (Rosa) and apple (Malus).
Last Recorded Year: 2025
First Recorded Year: 1975
Last Recorded By – Nikki Mahadevan
Last Recorded General Area – Shirland

Selected Images:  Kings Newton, Derbyshire – Will Soar©



Distribution Map for Acleris holmiana

Found 16 records
    ↳ 1 from After 2025
    ↳ 0 from 2020 - 2024
    ↳ 15 from Before 2020
Flying
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 – Acleris holmiana

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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.

Visit NBN Site


Monthly Records By Year: Acleris holmiana
( data includes both Larvae and Adult Stages )

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


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


CUSUM Analysis: Acleris holmiana
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 8 (August) 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 2004, 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 holmiana
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Acleris holmiana
( 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 holmiana – 16 records available

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

Site NameTetradDateCountStageSource
Shirland - Hallfieldgate LaneSK35Z01/07/20251adultvc57_irecords_extract
Ladycroft Ave, BuxtonSK07S10/07/20191adultvc57_irecords_extract
Ault Hucknall,GlapwellSK46S20/08/20121Adultvc57_danes_bc_data
George St,BelperSK34N26/07/20121Adultvc57_danes_bc_data
Ault Hucknall,GlapwellSK46S14/07/20071Adultvc57_danes_bc_data
Edgecote Drive,Newhall,SwadlincoteSK22V06/08/20061Adultvc57_danes_bc_data
Ault Hucknall,GlapwellSK46S16/07/20061Adultvc57_danes_bc_data
Ault Hucknall,GlapwellSK46S21/07/20062Adultvc57_danes_bc_data
Ault Hucknall,GlapwellSK46S28/07/20062Adultvc57_danes_bc_data
Main St,Kings Newton,MelbourneSK32Y23/06/20061Adultvc57_danes_bc_data
Wood Lane,Newhall,SwadlincoteSK22V29/06/200610Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y23/07/20041Adultvc57_irecords_extract
Main St,Kings Newton,MelbourneSK32Y23/07/20041Adultvc57_danes_bc_data
Askew Grove, ReptonSK32D04/08/19811Adultvc57_danes_bc_data
Askew Grove, ReptonSK32D21/07/19811Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K01/08/19751Adultvc57_danes_bc_data

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