35.146 BF776  –  Gelechiidae –  Gelechiinae – Teleiopsis diffinis – Common Groundling – (Haworth, 1828) 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   >>  Gelechiidae  >> Gelechiinae
Other Name/s: Large Groundling
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
ID pointers: A fairly long-wing species. Forewing greyish brown or greyish, variably spotted blackish and whitish. There are three obliquely place raised black spots, sometimes joined into a cross-line.
Distribution:  (Last record: 22 August 2025 at Glossop )  –  Less than 10 reported records records since 1984. Latest from Cromford 29/6/2024. On Sheep’s Sorrel and from Glossop 22/8/2025
Flight Period: May /  June /  July /  August /  September /  –  On the wing in May – September Moth Activity: Nocturnal  Crepuscular   – but often seen by day Photographed: Yes –  Photographed By: Steve Orridge, Clive Ashton, Christian Heintzen  © All Rights Reserved
*** Last updated on 23 August 2025 by TD ***
Wingspan: 14-16mm
Food Plant: Sheep’s sorrel (Rumex acetosa).
Last Recorded Year: 2025
Last Recorded By – Christian Heintzen
Last Recorded General Area – Glossop

IMAGES BELOW:  4/9/2015 – Buxton, Derbyshire – Steve Orridge© / 29/6/2024 – Cromford 2024 Clive Ashton© / Glossop (Aug 2025) Christian Heintzen©

Distribution Map for Teleiopsis diffinis

Found 6 records
    ↳ 2 from After 2025
    ↳ 1 from 2020 - 2024
    ↳ 3 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 – Teleiopsis diffinis

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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: Teleiopsis diffinis
( data includes both Larvae and Adult Stages )

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


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


CUSUM Analysis: Teleiopsis diffinis
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 22 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 2025, 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: Teleiopsis diffinis
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Teleiopsis diffinis
( 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 - Teleiopsis diffinis – 6 records available

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

TaxonSite NameTetradYearDateCountStageSource
Teleiopsis diffinisShaw Farm, New Mills VCSJ98Y202531/08/20251adultvc57_irecords_extract
Teleiopsis diffinisGang Mine, CromfordSK25X202509/06/20251adultvc57_irecords_extract
Teleiopsis diffinisupper cromford gardenSK25Y202429/06/20241adultvc57_irecords_extract
Teleiopsis diffinisBirch ValeSK08I201925/08/20191adultvc57_irecords_extract
Teleiopsis diffinisLadycroft Ave, BuxtonSK07S201504/09/20151adultvc57_irecords_extract
Teleiopsis diffinisWillington area, DerbySK22Z190502/04/19051Adultvc57_danes_bc_data

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