62.038 BF1437  –  Pyralidae –  Phycitinae – Acrobasis consociella – Grey Oak Knot-horn – (Hübner, 1813) 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   >>  Pyralidae  >> Phycitinae
Other Name/s: Broad-barred Knot-horn
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species:  Similar to other British Acrobasis species.
ID pointers: Forewing reddish brown to purplish-brown or greyish brown. A white cross band bordered black at about one third. Two small black discal spots about central forewing.
Distribution:  Unknown – As at 1988 no twentieth century record. Assume now to be fairly widespread and common as the species has expanded its range. Found on Oak.
Flight Period: May /  June /  July /  August /  –  On the wing during May – August. Moth Activity: Nocturnal   – and is attracted to light Photographed: Yes –  Photographed By: Tony Davison  © All Rights Reserved
*** Last updated on 2 October 2025 by RP ***
Last Recorded By – Not Recorded
Last Recorded General Area – Not Recorded

Selected Images:  Melbourne, Derbyshire – Tony Davison©



Distribution Map for Acrobasis consociella

Found 50 records
    ↳ 6 from After 2025
    ↳ 10 from 2020 - 2024
    ↳ 34 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 – Acrobasis consociella

⚠️ 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 consociella
( data includes both Larvae and Adult Stages )

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


First/Last Recorded Dates: Acrobasis consociella
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 consociella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Acrobasis consociella
AGR: 0.74%   |   Total % Change: 16.7%


CUSUM Analysis: Acrobasis consociella
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 9 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 2009, 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 consociella
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Acrobasis consociella
( 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 consociella – 50 records available

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

Site NameTetradDateCountStageSource
Cromford MoorSK25X13/07/20251adultvc57_irecords_extract
Inkersall gardenSK47G18/07/20251adultvc57_irecords_extract
Chaddesden, DerbySK33T03/07/20251adultvc57_irecords_extract
Belper, DerbyshireSK34N12/07/20251adultvc57_irecords_extract
Belper, DerbyshireSK34N23/07/20251adultvc57_irecords_extract
Markham Vale DerbyshireSK47K29/06/20252adultvc57_irecords_extract
Allestree, DerbySK33P07/08/20241adultvc57_irecords_extract
King's NewtonSK32Y29/07/20241adultvc57_irecords_extract
Markham Vale DerbyshireSK47L05/07/20231adultvc57_irecords_extract
Markham Vale South TipSK47K12/07/20231adultvc57_irecords_extract
Staveley DerbyshireSK47H19/07/20211adultvc57_irecords_extract
Woodland AveSK43R08/07/20211adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y14/08/20202Adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y05/08/20202Adultvc57_irecords_extract
Melbourne, DerbyshireSK32X17/07/20201adultvc57_irecords_extract
Wood Lane, Newhall, SwadlincoteSK22V17/07/20201adultDanes_2019-2021
Allestree, DerbySK34K02/09/20191pre-adultvc57_irecords_extract
Waingroves WoodsSK44E18/07/20181adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y16/07/20161Adultvc57_irecords_extract
Melbourne, DerbyshireSK32X26/08/20151adultvc57_irecords_extract
Shirland-Hallfieldgate LaneSK35Z16/08/20151Adultvc57_irecords_extract
Backgarden MarehaySK34Z23/07/20151adultvc57_irecords_extract
Backgarden MarehaySK34Z05/07/20141adultvc57_irecords_extract
Melbourne, DerbyshireSK32X19/08/20121adultvc57_irecords_extract
Spinney Hill,MelbourneSK32X20/08/20121Adultvc57_danes_bc_data
Backgarden MarehaySK34Z01/08/20111adultvc57_irecords_extract
Backgarden MarehaySK34Z11/08/20111adultvc57_irecords_extract
Bamford St,RipleySK34Z11/08/20111Adultvc57_danes_bc_data
Bamford St,RipleySK34Z01/08/20111Adultvc57_danes_bc_data
Backgarden MarehaySK34Z01/07/20111adultvc57_irecords_extract
Bamford St,RipleySK34Z01/07/20111Adultvc57_danes_bc_data
The Mays,Malthouse Lane,FroggattSK27N04/08/20101Adultvc57_danes_bc_data
Backgarden of Whitegates, CodnorSK44E09/07/20101adultvc57_irecords_extract
Backgarden MarehaySK34Z16/07/20101adultvc57_irecords_extract
Bamford St,RipleySK34Z16/07/20101Adultvc57_danes_bc_data
Whitegates, CodnorSK44E09/07/20101Adultvc57_danes_bc_data
Midway Rd,Midway,SwadlincoteSK32A09/07/20101Adultvc57_danes_bc_data
Drakelow NR (Minton's Lagoon), Burton on TrentSK22F24/07/20102Adultvc57_danes_bc_data
Wood Lane,Newhall,SwadlincoteSK22V10/07/20092Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y02/08/20081Adultvc57_irecords_extract
Carvers Rocks,Hartshorne,Swadlincote (old toilet block area)SK32G11/08/20072Adultvc57_danes_bc_data
Far Cross,Cavendish Park,MatlockSK36A21/08/20071Adultvc57_danes_bc_data
Rosliston (National Forest Centre), SwadlincoteSK21N27/07/20071Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y13/07/20052Adultvc57_irecords_extract
Foremark Resr, TicknallSK32H09/07/20051Adultvc57_danes_bc_data
Main St,Kings Newton,MelbourneSK32Y13/07/20052Adultvc57_danes_bc_data
Church St,Holloway,MatlockSK35I18/07/20051Adultvc57_danes_bc_data
Wood Lane,Newhall,SwadlincoteSK22V05/08/20041Adultvc57_danes_bc_data
Melbourne, DerbyshireSK32X13/07/20041adultvc57_irecords_extract
Spinney Hill,MelbourneSK32X13/07/20041Adultvc57_danes_bc_data

Scroll to Top