4.054 BF79  –  Nepticulidae –  Nepticulinae – Stigmella perpygmaeella – Least Hawthorn Dot – (Doubleday, 1859) Adult Micro:  CAT 4 – Gen. Det. Required – Gen-Det-Reqd       Leaf-miner:  CAT L – The leaf or a Photo required – reared and possibly dissected       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Black – Uncertain/Unknown – Insufficient Data        purple – Leaf Miner
Taxonomy:   Micro   >>  Nepticulidae  >> Nepticulinae
Other Name/s: Least Thorn Pigmy
ID Difficulty:  Red – difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required.
ID pointers: The species is fairly well-distributed throughout Britain. The larvae of this species feed on hawthorn (Crataegus), where they form a compact twisting gallery that usually becomes a ‘false blotch’ – where the gallery twists back on itself and touches the sides of the earlier part of the gallery. Adults have an orange head with creamy white eye caps the overall colour is a grey brown with a slight bronze or purplish sheen
Distribution:  (Last record: 20 August 2025 at Belper )  –  National Status – Common – Derbyshire status unknown – This photo of the leaf mine represents a first record for VC57 & Derbyshire. Lack of records and under-recorded. 13 mines found on 20/8/2025 at Wyver Lane on Hawthorn
Flight Period: May /  August /  –  two generations May & August Mine Period: July /  October /   – Leaf mine – July and October Photographed: Yes –  Photographed By: Dave Evans; Steve Orridge  © All Rights Reserved
*** Last updated on 12 October 2025 by TD ***
Wingspan: 4-5mm
Food Plant: Hawthorn
Last Recorded Year: 2025
Last Recorded By – Dave Evans
Last Recorded General Area – Belper

Selected Images:  Dave Evans – 1st September 2024 – Wyver Lane, Belper/ Rose End Meadows (2009) – Steve Orridge©



Distribution Map for Stigmella perpygmaeella

Found 12 records
    ↳ 2 from After 2025
    ↳ 1 from 2020 - 2024
    ↳ 9 from Before 2020
Flying
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Mining
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 – Stigmella perpygmaeella

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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: Stigmella perpygmaeella
( data includes both Larvae and Adult Stages )
No data returned from the database.

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


First/Last Recorded Dates: Stigmella perpygmaeella
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: Stigmella perpygmaeella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Stigmella perpygmaeella
AGR: 8.45%   |   Total % Change: 600%


CUSUM Analysis: Stigmella perpygmaeella
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 21 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 9 (September) 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: Stigmella perpygmaeella
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Stigmella perpygmaeella
( 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.

Mine Periods – Indicative –vs– Recorded Data
Stigmella perpygmaeella
( data includes both Larvae and Adult Stages )

Mine 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 mine periods [month/s]. The coloured lines represent the actual months seen mining, from site observation records received between 2020-2025.

Records Behind the Map and Charts - Stigmella perpygmaeella – 12 records available

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

Site NameTetradDateCountStageSource
DWT Wyver LaneSK34P20/08/202513mine (empty)vc57_irecords_extract
DWT Wyver LaneSK34P13/08/20251mine (empty)vc57_irecords_extract
DWT Wyver LaneSK34P04/09/20243mine (empty)vc57_irecords_extract
Thorpe, DovedaleSK15K13/10/20101Larval Minevc57_danes_bc_data
Ladybower ResrSK18U03/09/20101Larval Minevc57_danes_bc_data
Howden ResrSK19L25/08/20101Larval Minevc57_danes_bc_data
Upper Wood, Howden ResrSK19R25/08/20101Larval Minevc57_danes_bc_data
Rose End MeadowSK25Y16/10/20091minevc57_irecords_extract
Cromford, Matlock DE, UKSK25Y16/10/20091Larvavc57_irecords_extract
Rose End Meadows NR,CromfordSK25Y16/10/20091Larval Minevc57_danes_bc_data
Coombs Dale,Stoney MiddletonSK27H12/10/20091Larval Minevc57_danes_bc_data
Broomfield Hall, Morley, DerbySK34V03/11/20011Larval Minevc57_danes_bc_data

 
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