49.275 BF1192  –  Tortricidae –  Olethreutinae – Eucosma conterminana – Lettuce Tortrix – (Guenée, 1845) Adult Micro:  CAT 3 – Very Rare/Scarce/Migrant/Adventive – confusion with leaf mines       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Brown –  Significant Record / Very Rare / Vagrant    
Taxonomy:   Micro   >>  Tortricidae  >> Olethreutinae
Other Name/s: Pale Lettuce Bell
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species:  E.hohenwartiana
ID pointers: Forewing is a dark sandy or yellowish brown, with a distinctive pale cream triangular dorsal blotch and another creamy edge to inner margin towards the wing tip, which shows a conspicuous mark when the wing is closed.
Distribution:  (First record: August 2012 at Kings Newton )  –  (Last record: 2 August 2022 at Belper )  –  Not listed in Harrison & Sterling (1988). Possibly a new species for Derbyshire (this specimen was trapped in August 2012). Seems to be expanding its range but described as a local species in Britain.Maybe a possible immigrant.
Flight Period: July /  August /  –  On the wing during July – 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 ***
Wingspan: 15-19mm
Food Plant: Forms of lettuce plant, including cultivars.
Last Recorded Year: 2022
First Recorded Year: August 2012
Last Recorded By – Dave Evans
Last Recorded General Area – Belper

Selected Images:  Kings Newton, Derbyshire – Tony Davison©



Distribution Map for Eucosma conterminana

Found 13 records
    ↳ 3 from After 2025
    ↳ 2 from 2020 - 2024
    ↳ 8 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 – Eucosma conterminana

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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.

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Monthly Records By Year: Eucosma conterminana
( data includes both Larvae and Adult Stages )

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


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


CUSUM Analysis: Eucosma conterminana
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 20 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 2025, reaching above average levels. The lowest population point occurred near 2012, 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: Eucosma conterminana
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Eucosma conterminana
( 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 - Eucosma conterminana – 13 records available

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

Site NameTetradDateCountStageSource
Melbourne, DerbyshireSK32X13/07/20251adultvc57_irecords_extract
Markham Vale South TipSK47K17/07/20251adultvc57_irecords_extract
Markham Vale DerbyshireSK47K29/06/20251adultvc57_irecords_extract
BelperSK34U02/08/20221adultvc57_irecords_extract
Woodland AveSK43R27/07/20222adultvc57_irecords_extract
George St,BelperSK34N03/08/20121Adultvc57_danes_bc_data
Foremark Resr, TicknallSK32H09/07/20051Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y04/08/20041Adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y06/08/20041Adultvc57_irecords_extract
Main St,Kings Newton,MelbourneSK32Y06/08/20041Adultvc57_danes_bc_data
Main St,Kings Newton,MelbourneSK32Y04/08/20041Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y16/07/20031Adultvc57_irecords_extract
Main St,Kings Newton,MelbourneSK32Y16/07/20031Adultvc57_danes_bc_data

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