Treble-bar       The Streak
70.193 BF1868  –  Geometridae –  Larentiinae – Aplocera efformata – Lesser Treble-bar – (Guenée, 1857) Adult Macro:  CAT 2 – Can be confused with other species – Can be confused with other species       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.
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.
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 21 July 2025 by WS ***
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
IMAGES BELOW:  Melbourne 2024 – Tony Davison© / Cromford 2024 – Image by Clive Ashton ©   /  Darley Dale, Derbyshire – Image by Simon Roddis ©

70.193 BF1868 - Lesser Treble-bar - Geometridae - Aplocera efformata
Lesser Treble-bar – Tony Davison
70.193 BF1868 - Lesser Treble-bar - Geometridae - Aplocera efformata
Lesser Treble-bar – Tony Davison
70.193 BF1868 - Lesser Treble-bar - Geometridae - Aplocera efformata
Lesser Treble-bar – 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 – Simon Roddis
70.193 BF1868 - Lesser Treble-bar - Geometridae - Aplocera efformata
70.193 BF1868 - Lesser Treble-bar - Geometridae - Aplocera efformata
70.193 BF1868 - Lesser Treble-bar - Geometridae - Aplocera efformata
Lesser Treble-bar - Geometridae - Aplocera efformata - Clive Ashton
70.193 BF1868 - Lesser Treble-bar - Geometridae - Aplocera efformata

Lesser Treble-bar – Geometridae – Larentiinae – Aplocera efformat – colour code •

Lesser-Treble-bar-blunt-tip-of-abdomen-IMG_1651-1 Lesser Treble-bar showing blunt abdominal tip 20th September 2024 - Tony Davison©
Lesser-Treble-bar-_U8A7546-1 Lesser Treble-bar - 20th September 2024 - Melbourne - Tony Davison©
Lesser-Treble-bar-_U8A7481-2 Lesser Treble-bar - 20th September 2024 - Melbourne - Tony Davison©
Lesser-Treble-bar-_U8A7481-1 Lesser Treble-bar - 20th September 2024 - Melbourne - Tony Davison©
1868-lesser-treble-bar 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

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 – 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 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 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

TaxonSite NameTetradYearDateCountStageSource
Aplocera efformataupper cromford gardenSK25Y202511/05/20251adultvc57_irecords_extract
Aplocera efformataMelbourne, DerbyshireSK32X202420/09/20241adultvc57_irecords_extract
Aplocera efformataupper cromford gardenSK25Y202405/08/20241adultvc57_irecords_extract
Aplocera efformataupper cromford gardenSK25Y202408/08/20241adultvc57_irecords_extract
Aplocera efformataStonebroom.SK45E202431/07/20241adultvc57_irecords_extract
Aplocera efformataBelperSK34N202306/09/20231adultvc57_irecords_extract
Aplocera efformataBelperSK34N202307/09/20231adultvc57_irecords_extract
Aplocera efformataPleasley Pit CP, PleasleySK46X201609/06/20161Adultvc57_danes_bc_data
Aplocera efformataBlackwell TrailSK45I201429/04/20141Adultvc57_irecords_extract
Aplocera efformataCawdon Quarry area, MatlockSK26V201303/06/20135Adultvc57_danes_bc_data
Aplocera efformataCawdon Quarry area, MatlockSK26V201303/06/20135Adultvc57_danes_bc_data
Aplocera efformataBriar Close,Newhall,SwadlincoteSK22V201113/08/20111Adultvc57_danes_bc_data
Aplocera efformataBriar Close,Newhall,SwadlincoteSK22V201113/08/20111Adultvc57_danes_bc_data
Aplocera efformataThe Hollies,Station Rd,Darley DaleSK26R200903/08/20091Adultvc57_danes_bc_data
Aplocera efformataLancaster Ave,SandiacreSK43S200902/06/20091Adultvc57_danes_bc_data
Aplocera efformataLancaster Ave,SandiacreSK43S200921/05/20091Adultvc57_danes_bc_data
Aplocera efformataLancaster Ave,SandiacreSK43S200809/07/20081Adultvc57_danes_bc_data
Aplocera efformataElgar Drive,Sawley,Long EatonSK43R200701/09/20071Adultvc57_danes_bc_data
Aplocera efformataPleasley Pit NR (Woodyard)SK46X200711/08/20071Adultvc57_danes_bc_data
Aplocera efformataBriar Close,Newhall,SwadlincoteSK22V200712/08/20071Adultvc57_danes_bc_data
Aplocera efformataBriar Close,Newhall,SwadlincoteSK22V200712/08/20071Adultvc57_danes_bc_data
Aplocera efformataLancaster Ave,SandiacreSK43S200710/06/20071Adultvc57_danes_bc_data
Aplocera efformataLancaster Ave,SandiacreSK43S200711/06/20071Adultvc57_danes_bc_data
Aplocera efformataLancaster Ave,SandiacreSK43S200612/09/20062Adultvc57_danes_bc_data
Aplocera efformataPleasley Pit NR (Pit Buildings)SK46X200605/08/20062Adultvc57_danes_bc_data
Aplocera efformataPleasley Pit (Pit Buildings),PleasleySK46X200527/08/20051Adultvc57_danes_bc_data
Aplocera efformataWood Lane,Newhall,SwadlincoteSK22V200306/08/20031Adultvc57_danes_bc_data
Aplocera efformataWood Lane, Newhall, SwadlincoteSK22V200306/08/20031Adultvc57_danes_bc_data
Aplocera efformataLancaster Ave,SandiacreSK43S200111/08/20011Adultvc57_danes_bc_data
Aplocera efformataHall Dale Quarry,MatlockSK26V200114/08/200114Adultvc57_danes_bc_data
Aplocera efformataSchool Close,Parkway Gardens,Darley DaleSK26R200005/08/20001Adultvc57_danes_bc_data
Aplocera efformataGallows Inn Close,IlkestonSK44Q200005/08/20001Adultvc57_danes_bc_data
Aplocera efformataSchool Close,Parkway Gardens,Darley DaleSK26R200005/08/20001Adultvc57_danes_bc_data
Aplocera efformataLings Close,IlkestonSK44S199722/09/19971Adultvc57_danes_bc_data
Aplocera efformataRowsley Sidings, Rowsley (site not precise)SK26S199719/05/19971Adultvc57_danes_bc_data
Aplocera efformataElvaston Park, DerbySK43B199617/08/19961Adultvc57_danes_bc_data
Aplocera efformataElvaston Park, DerbySK43B199617/08/19961Adultvc57_danes_bc_data
Aplocera efformataRowsley Sidings, Rowsley (site not precise)SK26S199519/05/19954Adultvc57_danes_bc_data
Aplocera efformataThe Field,Shipley,IlkestonSK44M199418/08/19941Adultvc57_danes_bc_data
Aplocera efformataThe Field,Shipley,IlkestonSK44M199418/08/19941Adultvc57_danes_bc_data
Aplocera efformataDorothy Ave, SandiacreSK43T199431/07/19941Adultvc57_danes_bc_data
Aplocera efformatanr West HallamSK44L199327/08/19931Adultvc57_danes_bc_data
Aplocera efformatanr West HallamSK44L199327/08/19931Adultvc57_danes_bc_data
Aplocera efformataDorothy Ave, SandiacreSK43T199312/06/19931Adultvc57_danes_bc_data
Aplocera efformataDorothy Ave, SandiacreSK43T199306/06/19931Adultvc57_danes_bc_data
Aplocera efformataLang Rd, Alvaston, DerbySK33R199201/08/19921Adultvc57_danes_bc_data
Aplocera efformataPond House, Mapperley Res, IlkestonSK44G199221/05/19922Adultvc57_danes_bc_data
Aplocera efformataSpringfield Ave, SandiacreSK43S199223/05/19921Adultvc57_danes_bc_data
Aplocera efformataPond House, Mapperley Res, IlkestonSK44G199221/05/19922Adultvc57_danes_bc_data
Aplocera efformataDorothy Ave, SandiacreSK43T199003/08/19902Adultvc57_danes_bc_data
Aplocera efformataDorothy Ave, SandiacreSK43T199003/08/19902Adultvc57_danes_bc_data
Aplocera efformataRowsley Sidings Wildlife SiteSK26S198526/05/19851Adultvc57_irecords_extract
Aplocera efformataKnighton St, Hepthorne Lane, North WingfieldSK46C198203/08/19822Adultvc57_danes_bc_data
Aplocera efformataMatlock (Teacher Training College)SK36A198204/08/19821Adultvc57_danes_bc_data
Aplocera efformataBeeley Lodge, ChatsworthSK26U198207/07/19821Adultvc57_danes_bc_data
Aplocera efformataBeeley Lodge, ChatsworthSK26U198221/07/19821Adultvc57_danes_bc_data
Aplocera efformataBeeley Lodge, Chatsworth ParkSK26U198221/07/19821Adultvc57_danes_bc_data
Aplocera efformataBeeley Lodge, Chatsworth ParkSK26U198207/07/19821Adultvc57_danes_bc_data
Aplocera efformataBeeley Lodge, ChatsworthSK26U198222/05/19821Adultvc57_danes_bc_data
Aplocera efformataBeeley Lodge, Chatsworth ParkSK26U198222/05/19821Adultvc57_danes_bc_data
Aplocera efformataAskew Grove, ReptonSK32D198104/09/19811Adultvc57_danes_bc_data
Aplocera efformataTrentlock, Sawley, Long EatonSK43V198114/08/19811Adultvc57_danes_bc_data
Aplocera efformataDrummond Rd, IlkestonSK44R198009/08/19801Adultvc57_danes_bc_data
Aplocera efformataAskew Grove, ReptonSK32D197929/08/19791Adultvc57_danes_bc_data
Aplocera efformataBack Lane,GlapwellSK46T197820/08/19781Adultvc57_danes_bc_data
Aplocera efformataBack Lane, GlapwellSK46T197820/08/19781Adultvc57_danes_bc_data
Aplocera efformataShardlow Hall, Shardlow, Long EatonSK43F197714/08/19771Adultvc57_danes_bc_data
Aplocera efformataShardlow Hall, Shardlow, Long EatonSK43F197714/08/19771Adultvc57_danes_bc_data
Aplocera efformataBerry St, Hepthorne Lane, North WingfieldSK46C196828/08/19681Adultvc57_danes_bc_data

Treble-bar       The Streak

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