Yponomeuta malinellus       Yponomeuta rorrella
16.004 BF427  –  Yponomeutidae –  Yponomeutinae – Yponomeuta cagnagella – Spindle Ermine – (Hübner, [1813]) Adult Micro:  CAT 2 – Confusion Species –       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Blue –  Generally Common / Widespread   
Taxonomy:   Micro   >>  Yponomeutidae  >> Yponomeutinae
ID Difficulty:  Red – difficult to identify – detailed examination required, often a Gen Det and/or specimen and quality photographs are required.
Confusion Species: Y.malinellus & Y.rorrella
ID pointers: Very similar to other Yponomeutidae. Cannot reliably be identified without DNA Analysis or rearing the larvae from the food plant. Some sources say the moth can be identified by the pure white cilia as opposed to grey, but this is very unreliable. If in doubt record as Yponomeutidae aggregate (agg).
Distribution:  Widespread in Derbyshire and reasonably common wherever the food-plant exists. Can be identified by the masses of larval webs.
General Comment: None Flight Period: July /  August –  One generation July-August Moth Activity: Nocturnal   – and is attracted to light Photographed: No –  Photographed By: Not Recorded
*** Last updated on 2 October 2025 by RP ***
Wingspan: 19-26mm
 Food Plant: Spindle (Euonymus europaeus),
Recorded dates for Common [Blue code Blue-coded] moths are not stored on the website at this current time.
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Distribution Map for Yponomeuta cagnagella

Found 33 records
    ↳ 5 from After 2025
    ↳ 4 from 2020 - 2024
    ↳ 24 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 – Yponomeuta cagnagella

⚠️ 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: Yponomeuta cagnagella
( data includes both Larvae and Adult Stages )

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


First/Last Recorded Dates: Yponomeuta cagnagella
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: Yponomeuta cagnagella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Yponomeuta cagnagella
AGR: 23.28%   |   Total % Change: 9900%


CUSUM Analysis: Yponomeuta cagnagella
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 15 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 2013, 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: Yponomeuta cagnagella
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Yponomeuta cagnagella
( 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 - Yponomeuta cagnagella – 33 records available

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

Site NameTetradDateCountStageSource
Beckets Wood, Chapel-en-le-FrithSK07P04/06/20251Larvavc57_irecords_extract
Burton-on-Trent, StaffordshireSK22W02/06/202510larval webvc57_irecords_extract
Trent LockSK43V24/05/20251larval webvc57_irecords_extract
Forbes Hole LNR, Long Eaton - SSK43W20/05/2025100Adultvc57_irecords_extract
Forbes Hole LNRSK43W20/05/2025100larvavc57_irecords_extract
Creswell Crags – North side of gorgeSK57H12/06/20241Not recordedvc57_irecords_extract
West Park Fox Covert LNRSK43W31/05/20241larvavc57_irecords_extract
Coal AstonSK37U13/06/202310larvavc57_irecords_extract
Pioneer MeadowSK43P24/05/20231larvavc57_irecords_extract
Main Street, Kings NewtonSK32Y21/08/20134Adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y30/07/20132Adultvc57_irecords_extract
Main St,Kings Newton,MelbourneSK32Y30/07/20132Adultvc57_danes_bc_data
Kingsway (B&Q car park), DerbySK33I16/06/20131000Larvaevc57_danes_bc_data
Duffield Rd, Allestree, DerbySK34K20/08/20121Adultvc57_danes_bc_data
DovedaleSK15K30/07/20102Adultvc57_danes_bc_data
DovedaleSK15K30/07/20101Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y02/08/20095Adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y15/07/20095Adultvc57_irecords_extract
Duffield Rd, Allestree, DerbySK34K11/07/20091Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y02/08/200816Adultvc57_irecords_extract
Melbourne, DerbyshireSK32X10/08/20072adultvc57_irecords_extract
Spinney Hill,MelbourneSK32X07/07/20061Adultvc57_danes_bc_data
Church St,Holloway,MatlockSK35I17/06/20061Adultvc57_danes_bc_data
Church St,Holloway,MatlockSK35I12/06/20061Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y01/08/20056Adultvc57_irecords_extract
Main St,Kings Newton,MelbourneSK32Y01/08/20056Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y26/07/20053Adultvc57_irecords_extract
Main St,Kings Newton,MelbourneSK32Y26/07/20053Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y13/08/20041Adultvc57_irecords_extract
Main St,Kings Newton,MelbourneSK32Y13/08/20041Adultvc57_danes_bc_data
Main Street, Kings NewtonSK32Y06/08/20041Adultvc57_irecords_extract
Main St,Kings Newton,MelbourneSK32Y06/08/20041Adultvc57_danes_bc_data
Wood Lane,Newhall,SwadlincoteSK22V18/08/20031Adultvc57_danes_bc_data

Yponomeuta malinellus       Yponomeuta rorrella

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