Acrobasis tumidana       Acrobasis advenella
62.034 BF1436  –  Pyralidae –  Phycitinae – Acrobasis repandana – Beautiful Oak Knot-horn – (Fabricius, 1798) Adult Micro:  CAT 1 – Distinctive Species –       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Blue –  Generally Common / Widespread   
Taxonomy:   Micro   >>  Pyralidae  >> Phycitinae
Other Name/s: Warted Knot-horn, Conobathra repandana
ID Difficulty:  green  – easy to identify, generally distinctive and unlikely to be confused with other species.
ID pointers: Forewing is grey with pinkish, reddish and orange markings – a white cross-band, edged black at about a third. A very colourful pyralid.
Distribution:  Probably locally common in the county where there is oak.
Flight Period: July /  August /  –  On the wing during July – August. Moth Activity: Nocturnal   – sometimes seen during the day Photographed: Yes –  Photographed By: Dave Evans  © All Rights Reserved
*** Last updated on 26 July 2025 by TD ***
Wingspan: 20-25mm
 Food Plant: Oak (Quercus).
Recorded dates for Common [Blue code Blue-coded] moths are not stored on the website at this current time.
IMAGES BELOW:  Belper, Derbyshire – Dave Evans©

62.034 BF1436 - Pyralidae - Phycitinae - Acrobasis repandana
Acrobasis repandana – Belper – Dave Evans
62.034 BF1436 - Pyralidae - Phycitinae - Acrobasis repandana

no images were found

Distribution Map for Acrobasis repandana

Found 27 records
    ↳ 3 from After 2025
    ↳ 5 from 2020 - 2024
    ↳ 19 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 – Acrobasis repandana

⚠️ Please wait for the map to load fully – do not click the link shown.


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: Acrobasis repandana
( data includes both Larvae and Adult Stages )

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


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


CUSUM Analysis: Acrobasis repandana
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 14 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 2007, 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: Acrobasis repandana
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Acrobasis repandana
( 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 - Acrobasis repandana – 27 records available

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

TaxonSite NameTetradYearDateCountStageSource
Acrobasis repandanaFindern, DerbyshireSK33A202511/07/20251adultvc57_irecords_extract
Acrobasis repandanaBelperSK34N202524/07/20251adultvc57_irecords_extract
Acrobasis repandanaChaddesden, DerbySK33T202530/06/20251adultvc57_irecords_extract
Acrobasis repandanaSandiacreSK43S202419/07/20241adultvc57_irecords_extract
Acrobasis repandanaBelperSK34N202424/06/20241adultvc57_irecords_extract
Acrobasis repandanaBelperSK34U202303/07/20231adultvc57_irecords_extract
Acrobasis repandanaWoodland AveSK43R202006/07/20201adultvc57_irecords_extract
Acrobasis repandanaWoodland AveSK43R202021/07/20201adultvc57_irecords_extract
Acrobasis repandanaThe Meads, Shipley Park, HeanorSK44H201913/07/20191adultDanes_2019-2021
Acrobasis repandanaBelperSK34U201708/07/20171adultvc57_irecords_extract
Acrobasis repandanaWood Lane,Newhall,SwadlincoteSK22V201418/07/20141Adultvc57_danes_bc_data
Acrobasis repandanaMidway, Derbys.SK32A200925/07/20091adultvc57_irecords_extract
Acrobasis repandanaMidway Rd,Midway,SwadlincoteSK32A200925/07/20091Adultvc57_danes_bc_data
Acrobasis repandanaWest Park Meadows (LNR),SpondonSK33Y200910/07/20091Adultvc57_danes_bc_data
Acrobasis repandanaCalke Park Ridge from Fisherman's Car ParkSK32R200731/07/20073adultvc57_irecords_extract
Acrobasis repandanaCalke Park Ticknall Lime YardsSK32R200722/07/20072adultvc57_irecords_extract
Acrobasis repandanaTicknall Limeyards,TicknallSK32R200722/07/20072Adultvc57_danes_bc_data
Acrobasis repandanaCarvers Rocks, Hartshorne, SwadlincoteSK32G200723/06/20071Adultvc57_danes_bc_data
Acrobasis repandanaMidway Rd,Midway,SwadlincoteSK32A200621/07/20066Adultvc57_danes_bc_data
Acrobasis repandanaMidway Rd,Midway,SwadlincoteSK32A200607/07/20062Adultvc57_danes_bc_data
Acrobasis repandanaMidway Rd,Midway,SwadlincoteSK32A200615/07/20061Adultvc57_danes_bc_data
Acrobasis repandanaMidway Rd,Midway,SwadlincoteSK32A200601/07/20061Adultvc57_danes_bc_data
Acrobasis repandanaForemark Resr (pumping station), TicknallSK32H200614/07/20061Adultvc57_danes_bc_data
Acrobasis repandanaFar Cross,Cavendish Park,MatlockSK36A200619/07/20061Adultvc57_danes_bc_data
Acrobasis repandanaMain St,Kings Newton,MelbourneSK32Y200513/07/20052Adultvc57_danes_bc_data
Acrobasis repandanaRosliston (National Forest Centre), SwadlincoteSK21N200406/08/20041Adultvc57_danes_bc_data
Acrobasis repandanaRepton Shrubs, ReptonSK32B190502/04/19051Adultvc57_danes_bc_data

Acrobasis tumidana       Acrobasis advenella

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