Treble-bar       The Streak
70.193 BF1868  –  Geometridae –  Larentiinae – Aplocera efformata – Lesser Treble-bar – (Guenée, 1857) Adult Macro:  CAT 3 – Difficult to identify/Very rare/Scarce species (includes very scarce adventives/immigrants)/County-level first records – images or specimen may be required – Difficult to identify /Very rare/Scarce (includes very scarce adventives/immigrants)/County-level first records       PDF Icon – click for Adult Macro Verification Guidelines
Green –  Rare / Uncommon / Scarce        day-flying – Day-flying
Taxonomy:   Macro   >>  Geometridae  >> Larentiinae
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species:  Treble-bar
ID pointers: 

Very similar to Treble-bar but slightly smaller and the cross bands are usually paler and less intense. The tip of the abdomen is blunt. The angle of the basal cross band is usually acute, thin and sharp but can be 90° so other features need to be considered. The best way to ID this species is by looking at the tip of the abdomen which can be easily done if the moth is contained in a see through pot. A photograph of the abdomen tip should accompany the record.  

Distribution:  (First record: 1970 )  –  (Last record: 20 September 2024 at Melbourne )  –  A resident species that has become locally scarce, with most records coming from the central Derwent Valley. Once a well distributed and locally common species in Derbyshire. A recent colonist in the county with the first record in 1970. Very few records.
General Comment: None Flight Period: May /  June /  July /  August /  September –  On the wing – May – June and Late July – September. Two generations Moth Activity: Nocturnal   – but often seen by day Photographed: Yes –  Photographed By: Simon Roddis, Clive Ashton, Tony Davison  © All Rights Reserved
*** Last updated on 30 November 2025 by TD ***
Wingspan: 35-41mm
Forewing: 16-19mm Food Plant: St. Johns-wort (Hypericum spp.).
Last Recorded Year: 2024
First Recorded Year: 1970
Last Recorded By – Tony Davison
Last Recorded General Area – Melbourne

 

Selected Images:  Melbourne 20/9/2024 – Tony Davison© / Cromford 2024 & 2025 – by Clive Ashton ©   / Darley Dale, Derbyshire 2012 – Simon Roddis ©

Lesser Treble-bar - 20th Sept 2024 - Melbourne - Tony Davison
Lesser Treble-bar – 20th Sept 2024 – Melbourne – Tony Davison
Lesser Treble-bar - 20th Sept 2024 - Melbourne - Tony Davison
Lesser Treble-bar – 20th Sept 2024 – Melbourne – Tony Davison
Lesser Treble-bar - abdomen tip (square/blunt) - 20th Sept 2024 - Melbourne - Tony Davison
Lesser Treble-bar – abdomen tip (square/blunt) – 20th Sept 2024 – Melbourne – Tony Davison
Lesser Treble-bar - Geometridae - Aplocera efformata - Clive Ashton
Lesser Treble-bar – Aplocera efformata – Clive Ashton
70.193 BF1868 - Lesser Treble-bar - Geometridae - Aplocera efformata
Lesser Treble-bar – Aplocera efformata
Lesser Treble-bar - 11th May 2025 - Cromford - Clive Ashton
Lesser Treble-bar – 11th May 2025 – Cromford – Clive Ashton
Lesser Treble-bar - showing blunt abdominal tip - 11th May 2025 - Cromford - Clive Ashton
Lesser Treble-bar – showing blunt abdominal tip – 11th May 2025 – Cromford – Clive Ashton
Lesser Treble-bar - 20th Sept 2024 - Melbourne - Tony Davison
Lesser Treble-bar - 20th Sept 2024 - Melbourne - Tony Davison
Lesser Treble-bar - abdomen tip (square/blunt) - 20th Sept 2024 - Melbourne - Tony Davison
Lesser Treble-bar - Geometridae - Aplocera efformata - Clive Ashton
70.193 BF1868 - Lesser Treble-bar - Geometridae - Aplocera efformata
Lesser Treble-bar - 11th May 2025 - Cromford - Clive Ashton
Lesser Treble-bar - showing blunt abdominal tip - 11th May 2025 - Cromford - Clive Ashton


Image Gallery

Lesser Treble-bar showing blunt abdominal tip 20th September 2024 - Tony Davison© Lesser Treble-bar - 20th September 2024 - Melbourne - Tony Davison© Lesser Treble-bar - 20th September 2024 - Melbourne - Tony Davison© Lesser Treble-bar - 20th September 2024 - Melbourne - Tony Davison© Lesser Treble Bar - Darley Dale - Simon Roddis©

Distribution Map for Aplocera efformata

Found 69 records
    ↳ 1 from After 2025
    ↳ 6 from 2020 - 2024
    ↳ 62 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 – Aplocera efformata

⚠️ 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: Aplocera efformata
( data includes both Larvae and Adult Stages )

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


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


CUSUM Analysis: Aplocera efformata
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 11 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 10 (October) 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 2001, reaching above average levels. The lowest population point occurred near 2000, 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: Aplocera efformata
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Aplocera efformata
( 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 - Aplocera efformata – 69 records available

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

Site NameTetradDateCountStageSource
upper cromford gardenSK25Y11/05/20251adultvc57_irecords_extract
Melbourne, DerbyshireSK32X20/09/20241adultvc57_irecords_extract
upper cromford gardenSK25Y08/08/20241adultvc57_irecords_extract
upper cromford gardenSK25Y05/08/20241adultvc57_irecords_extract
Stonebroom.SK45E31/07/20241adultvc57_irecords_extract
BelperSK34N07/09/20231adultvc57_irecords_extract
BelperSK34N06/09/20231adultvc57_irecords_extract
Pleasley Pit CP, PleasleySK46X09/06/20161Adultvc57_danes_bc_data
Blackwell TrailSK45I29/04/20141Adultvc57_irecords_extract
Cawdon Quarry area, MatlockSK26V03/06/20135Adultvc57_danes_bc_data
Cawdon Quarry area, MatlockSK26V03/06/20135Adultvc57_danes_bc_data
Briar Close,Newhall,SwadlincoteSK22V13/08/20111Adultvc57_danes_bc_data
Briar Close,Newhall,SwadlincoteSK22V13/08/20111Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R03/08/20091Adultvc57_danes_bc_data
Lancaster Ave,SandiacreSK43S02/06/20091Adultvc57_danes_bc_data
Lancaster Ave,SandiacreSK43S21/05/20091Adultvc57_danes_bc_data
Lancaster Ave,SandiacreSK43S09/07/20081Adultvc57_danes_bc_data
Elgar Drive,Sawley,Long EatonSK43R01/09/20071Adultvc57_danes_bc_data
Briar Close,Newhall,SwadlincoteSK22V12/08/20071Adultvc57_danes_bc_data
Briar Close,Newhall,SwadlincoteSK22V12/08/20071Adultvc57_danes_bc_data
Pleasley Pit NR (Woodyard)SK46X11/08/20071Adultvc57_danes_bc_data
Lancaster Ave,SandiacreSK43S11/06/20071Adultvc57_danes_bc_data
Lancaster Ave,SandiacreSK43S10/06/20071Adultvc57_danes_bc_data
Lancaster Ave,SandiacreSK43S12/09/20062Adultvc57_danes_bc_data
Pleasley Pit NR (Pit Buildings)SK46X05/08/20062Adultvc57_danes_bc_data
Pleasley Pit (Pit Buildings),PleasleySK46X27/08/20051Adultvc57_danes_bc_data
Wood Lane,Newhall,SwadlincoteSK22V06/08/20031Adultvc57_danes_bc_data
Wood Lane, Newhall, SwadlincoteSK22V06/08/20031Adultvc57_danes_bc_data
Hall Dale Quarry,MatlockSK26V14/08/200114Adultvc57_danes_bc_data
Lancaster Ave,SandiacreSK43S11/08/20011Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R05/08/20001Adultvc57_danes_bc_data
Gallows Inn Close,IlkestonSK44Q05/08/20001Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R05/08/20001Adultvc57_danes_bc_data
Lings Close,IlkestonSK44S22/09/19971Adultvc57_danes_bc_data
Rowsley Sidings, Rowsley (site not precise)SK26S19/05/19971Adultvc57_danes_bc_data
Elvaston Park, DerbySK43B17/08/19961Adultvc57_danes_bc_data
Elvaston Park, DerbySK43B17/08/19961Adultvc57_danes_bc_data
Rowsley Sidings, Rowsley (site not precise)SK26S19/05/19954Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M18/08/19941Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M18/08/19941Adultvc57_danes_bc_data
Dorothy Ave, SandiacreSK43T31/07/19941Adultvc57_danes_bc_data
nr West HallamSK44L27/08/19931Adultvc57_danes_bc_data
nr West HallamSK44L27/08/19931Adultvc57_danes_bc_data
Dorothy Ave, SandiacreSK43T12/06/19931Adultvc57_danes_bc_data
Dorothy Ave, SandiacreSK43T06/06/19931Adultvc57_danes_bc_data
Lang Rd, Alvaston, DerbySK33R01/08/19921Adultvc57_danes_bc_data
Springfield Ave, SandiacreSK43S23/05/19921Adultvc57_danes_bc_data
Pond House, Mapperley Res, IlkestonSK44G21/05/19922Adultvc57_danes_bc_data
Pond House, Mapperley Res, IlkestonSK44G21/05/19922Adultvc57_danes_bc_data
Dorothy Ave, SandiacreSK43T03/08/19902Adultvc57_danes_bc_data
Dorothy Ave, SandiacreSK43T03/08/19902Adultvc57_danes_bc_data
Rowsley Sidings Wildlife SiteSK26S26/05/19851Adultvc57_irecords_extract
Matlock (Teacher Training College)SK36A04/08/19821Adultvc57_danes_bc_data
Knighton St, Hepthorne Lane, North WingfieldSK46C03/08/19822Adultvc57_danes_bc_data
Beeley Lodge, ChatsworthSK26U21/07/19821Adultvc57_danes_bc_data
Beeley Lodge, Chatsworth ParkSK26U21/07/19821Adultvc57_danes_bc_data
Beeley Lodge, ChatsworthSK26U07/07/19821Adultvc57_danes_bc_data
Beeley Lodge, Chatsworth ParkSK26U07/07/19821Adultvc57_danes_bc_data
Beeley Lodge, ChatsworthSK26U22/05/19821Adultvc57_danes_bc_data
Beeley Lodge, Chatsworth ParkSK26U22/05/19821Adultvc57_danes_bc_data
Askew Grove, ReptonSK32D04/09/19811Adultvc57_danes_bc_data
Trentlock, Sawley, Long EatonSK43V14/08/19811Adultvc57_danes_bc_data
Drummond Rd, IlkestonSK44R09/08/19801Adultvc57_danes_bc_data
Askew Grove, ReptonSK32D29/08/19791Adultvc57_danes_bc_data
Back Lane,GlapwellSK46T20/08/19781Adultvc57_danes_bc_data
Back Lane, GlapwellSK46T20/08/19781Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F14/08/19771Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F14/08/19771Adultvc57_danes_bc_data
Berry St, Hepthorne Lane, North WingfieldSK46C28/08/19681Adultvc57_danes_bc_data

Treble-bar       The Streak

Copyright Tony Davison © 2025 www.derbyshiremoths.org

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