Yponomeuta cagnagella       Yponomeuta plumbella
16.005 BF428  –  Yponomeutidae –  Yponomeutinae – Yponomeuta rorrella – Willow Ermine – (Hübner, 1796) Adult Micro:  CAT 2 – Confusion Species –       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Green –  Rare / Uncommon / Scarce       orange – Migrant
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: Orchard Ermine (Yponomeuta padella), Apple Ermine (Yponomeuta malinellus), Spindle Ermine (Yponomeuta cagnagella)
ID pointers: Difficult to ID as are the majority of the yponomeuta group, but longer and more narrow winged, with two toned white and grey forewings with black dots which are smaller in size than other yponomeuta. Mostly white in the dorsal half and in a thin line along the costa with a small white blotch along the costa near the apex which is contrasting against the grey rear third.
Distribution:  (Last record: 6 September 2024 at Long Eaton )  –  Not listed in Harrison & Sterling (1988) – Most probably a local species, and occasional migrant found where there is White Willow Salix alba and Grey Willow (S.cinerea) A huge migrant influx occurred in 2023
Flight Period: July /  August /  –  On the wing July – August Moth Activity: Nocturnal   – and is attracted to light Photographed: Yes –  Photographed By: Tony Davison  © All Rights Reserved
*** Last updated on 6 May 2025 by RP ***
Wingspan: 19-24mm
 Food Plant: Salix – White Willow & Grey Willow
Last Recorded Year: 2024
Last Recorded By – Marion Bryce
Last Recorded General Area – Long Eaton
IMAGES BELOW:  Melbourne, Derbyshire – Tony Davison ©

Yponomeuta rorrella - Tony Davison
Yponomeuta rorrella
Willow-Ermine - Tony Davison
Willow-Ermine – Tony Davison
Willow-Ermine - Tony Davison
Willow-Ermine – Tony Davison
Yponomeuta rorrella - Tony Davison
Willow-Ermine - Tony Davison
Willow-Ermine - Tony Davison

 
 

no images were found

 

Distribution Map for Yponomeuta rorrella

Found 131 records
    ↳ 9 from After 2025
    ↳ 105 from 2020 - 2024
    ↳ 17 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 – Yponomeuta rorrella

⚠️ 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 rorrella
( data includes both Larvae and Adult Stages )

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


First/Last Recorded Dates: Yponomeuta rorrella
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 rorrella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Yponomeuta rorrella
AGR: 5.54%   |   Total % Change: 150%


CUSUM Analysis: Yponomeuta rorrella
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 2024, reaching above average levels. The lowest population point occurred near 2021, 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 rorrella
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Yponomeuta rorrella
( 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 rorrella – 131 records available

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

TaxonSite NameTetradYearDateCountStageSource
Yponomeuta rorrellaWingerworth, DerbyshireSK36Y202515/08/20251adultvc57_irecords_extract
Yponomeuta rorrellaIlkeston, DerbyshireSK44K202511/07/20258adultvc57_irecords_extract
Yponomeuta rorrellaIlkeston, DerbyshireSK44K202519/07/20256adultvc57_irecords_extract
Yponomeuta rorrellaIlkeston, DerbyshireSK44K202526/07/20251adultvc57_irecords_extract
Yponomeuta rorrellaupper cromford gardenSK25Y202529/07/20251adultvc57_irecords_extract
Yponomeuta rorrellaMickleover gardenSK33C202504/07/20251adultvc57_irecords_extract
Yponomeuta rorrellaMickleover gardenSK33C202529/06/20251adultvc57_irecords_extract
Yponomeuta rorrellaTrent LockSK43V202524/05/20251larval webvc57_irecords_extract
Yponomeuta rorrellaGlossop, Hague Street, Hay MeadowSK09G202521/05/20251adultvc57_irecords_extract
Yponomeuta rorrellaWest Park Fox Covert LNRSK43W202406/09/20245adultvc57_irecords_extract
Yponomeuta rorrellaBelperSK34U202403/08/20241adultvc57_irecords_extract
Yponomeuta rorrellaMickleover gardenSK33C202401/08/20242adultvc57_irecords_extract
Yponomeuta rorrellaMarkham Vale DerbyshireSK47K202409/08/20241adultvc57_irecords_extract
Yponomeuta rorrellaIlkeston, DerbyshireSK44K202410/08/20244adultvc57_irecords_extract
Yponomeuta rorrellaChaddesden, DerbySK33T202404/08/20241adultvc57_irecords_extract
Yponomeuta rorrellaIlkeston, DerbyshireSK44K202429/08/20241adultvc57_irecords_extract
Yponomeuta rorrellaGlossop, Gnat Hole Rough FieldsSK09L202401/08/20241adultvc57_irecords_extract
Yponomeuta rorrellaDerbyshire Wild Life Trust Long CloughSK09G202404/08/202420adultvc57_irecords_extract
Yponomeuta rorrellaLongdendale, Wildboar Clough WoodlandSK09U202411/08/20241adultvc57_irecords_extract
Yponomeuta rorrellaGlossop, Hague Street, Hay meadowSK09G202415/08/20241adultvc57_irecords_extract
Yponomeuta rorrellaDerbyshire Wild Life Trust Long CloughSK09G202423/08/20244adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202402/08/202421adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202409/08/20241adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202416/08/20241adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202423/08/20241adultvc57_irecords_extract
Yponomeuta rorrellaInkersall gardenSK47G202420/07/20241adultvc57_irecords_extract
Yponomeuta rorrellaMelbourne, DerbyshireSK32X202419/07/20245adultvc57_irecords_extract
Yponomeuta rorrellaMelbourne, DerbyshireSK32X202423/07/20241adultvc57_irecords_extract
Yponomeuta rorrellaScalpcliffe roadSK22R202430/07/20244adultvc57_irecords_extract
Yponomeuta rorrellaIlkeston, DerbyshireSK44K202428/07/20248adultvc57_irecords_extract
Yponomeuta rorrellaMickleover gardenSK33C202429/07/202411adultvc57_irecords_extract
Yponomeuta rorrellaMickleover gardenSK33C202431/07/20243adultvc57_irecords_extract
Yponomeuta rorrellaClover Close, ElvastonSK43B202429/07/20241adultvc57_irecords_extract
Yponomeuta rorrellaLongdendale, Pasture WoodSK09U202426/07/20241adultvc57_irecords_extract
Yponomeuta rorrellaGlossop, Hague Street, Hay meadowSK09G202430/07/20242adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202427/07/20243adultvc57_irecords_extract
Yponomeuta rorrellaHigh Leas Farm, RiberSK35D202428/07/20241adultvc57_irecords_extract
Yponomeuta rorrellaKing's NewtonSK32Y202429/07/20241098adultvc57_irecords_extract
Yponomeuta rorrellaDerby DESK33I202431/07/20245adultvc57_irecords_extract
Yponomeuta rorrellaHigh Bridge GPSK22Y202408/06/202410larvavc57_irecords_extract
Yponomeuta rorrellaFindern GardenSK33A202301/09/20231Adultvc57_irecords_extract
Yponomeuta rorrellaMelbourne, DerbyshireSK32X202311/08/202315adultvc57_irecords_extract
Yponomeuta rorrellaMarkham Vale DerbyshireSK47L202310/08/20233adultvc57_irecords_extract
Yponomeuta rorrellaStaveley DerbyshireSK47H202311/08/20239adultvc57_irecords_extract
Yponomeuta rorrellaStaveley DerbyshireSK47H202314/08/20233adultvc57_irecords_extract
Yponomeuta rorrellaStaveley DerbyshireSK47H202323/08/20231adultvc57_irecords_extract
Yponomeuta rorrellaMelbourne, DerbyshireSK32X202311/08/202312adultvc57_irecords_extract
Yponomeuta rorrellaStaunton Harold Reservoir, DerbyshireSK32S202315/08/202315adultvc57_irecords_extract
Yponomeuta rorrellaWaingroves WoodsSK44E202304/08/20239adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202306/08/20233adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202319/08/20237adultvc57_irecords_extract
Yponomeuta rorrellaFindern GardenSK33A202304/08/202311Adultvc57_irecords_extract
Yponomeuta rorrellaFindern GardenSK33A202310/08/20236Adultvc57_irecords_extract
Yponomeuta rorrellaFindern GardenSK33A202311/08/20233Adultvc57_irecords_extract
Yponomeuta rorrellaFindern GardenSK33A202316/08/20234Adultvc57_irecords_extract
Yponomeuta rorrellaGlossop, Moorfield, Wood's CabinSK09L202303/08/20235adultvc57_irecords_extract
Yponomeuta rorrellaGlossop, Bray CloughSK09L202309/08/20231adultvc57_irecords_extract
Yponomeuta rorrellaGlossop, Gnat Hole Rough FieldsSK09L202319/08/20231adultvc57_irecords_extract
Yponomeuta rorrellaGlossop, Gnat Hole Rough FieldsSK09L202321/08/20231adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202321/07/20237adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202328/07/202326adultvc57_irecords_extract
Yponomeuta rorrellaFindern GardenSK33A202318/07/20232Adultvc57_irecords_extract
Yponomeuta rorrellaFindern GardenSK33A202321/07/20235Adultvc57_irecords_extract
Yponomeuta rorrellaFindern GardenSK33A202324/07/20232Adultvc57_irecords_extract
Yponomeuta rorrellaFindern GardenSK33A202327/07/202360Adultvc57_irecords_extract
Yponomeuta rorrellaFindern GardenSK33A202328/07/202310Adultvc57_irecords_extract
Yponomeuta rorrellaMickleover gardenSK33C202329/07/20231adultvc57_irecords_extract
Yponomeuta rorrellaGlossop, Moorfield, Wood's CabinSK09L202319/07/20231adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202205/08/20221adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202226/08/20221adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202203/08/20221adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202208/08/20226adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202210/08/20222adultvc57_irecords_extract
Yponomeuta rorrellaStaveley DerbyshireSK47H202219/07/20223adultvc57_irecords_extract
Yponomeuta rorrellaStaveley DerbyshireSK47H202225/07/20221adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202216/07/20227Adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202219/07/202216Adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202208/07/20222adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202211/07/20221adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202217/07/20221adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202218/07/20221adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202229/07/20225adultvc57_irecords_extract
Yponomeuta rorrellaKirk Hallam, IlkestonSK44K202208/07/20222adultvc57_irecords_extract
Yponomeuta rorrellaKirk Hallam, IlkestonSK44K202217/07/20225adultvc57_irecords_extract
Yponomeuta rorrellaKirk Hallam, IlkestonSK44K202222/07/202220adultvc57_irecords_extract
Yponomeuta rorrellaKirk Hallam, IlkestonSK44K202229/07/202223adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202101/08/202113adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202108/08/20212adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202113/08/20212adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202102/08/20215adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202111/08/20211adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202120/08/20211adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202123/08/20211adultvc57_irecords_extract
Yponomeuta rorrellaNot givenSK33A202109/07/20211Adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202118/07/20211adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202120/07/20212adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202109/07/20211adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202116/07/20211adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202119/07/20215adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202126/07/202117adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202006/08/20201adultvc57_irecords_extract
Yponomeuta rorrellaMelbourne, DerbyshireSK32X202013/08/20201adultvc57_irecords_extract
Yponomeuta rorrellaMelbourne, DerbyshireSK32X202020/08/20202adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202007/08/20206adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202011/08/20203adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202017/07/20202adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202021/07/20205adultvc57_irecords_extract
Yponomeuta rorrellaWoodland AveSK43R202029/07/20204adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202017/07/20201adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202021/07/20202adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202028/07/20201adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A202030/07/20203adultvc57_irecords_extract
Yponomeuta rorrellaKirk Hallam, IlkestonSK44K202031/07/20201adultvc57_irecords_extract
Yponomeuta rorrellaWood Lane, Newhall, SwadlincoteSK22V202017/07/20201adultDanes_2019-2021
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A201902/08/20193adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A201907/08/20191adultvc57_irecords_extract
Yponomeuta rorrellaFindern, Derbyshire, DEAZSK33A201926/07/20193adultvc57_irecords_extract
Yponomeuta rorrellaMain Street, Kings NewtonSK32Y201818/07/20181Adultvc57_irecords_extract
Yponomeuta rorrellaStraw's Bridge, Ilkeston, Meadow near Sustrans Cycle TrackSK44K201611/08/20161adultvc57_irecords_extract
Yponomeuta rorrellaMain Street, Kings NewtonSK32Y201509/07/20151Adultvc57_irecords_extract
Yponomeuta rorrellaMain Street, Kings NewtonSK32Y201406/08/20142Adultvc57_irecords_extract
Yponomeuta rorrellaBackgarden MarehaySK34Z201303/08/20131adultvc57_irecords_extract
Yponomeuta rorrellaBackgarden MarehaySK34Z201326/07/20133adultvc57_irecords_extract
Yponomeuta rorrellaDuffield Rd, Allestree, DerbySK34K201315/07/20131Adultvc57_danes_bc_data
Yponomeuta rorrellaMain Street, Kings NewtonSK32Y201219/08/20122Adultvc57_irecords_extract
Yponomeuta rorrellaMain St,Kings Newton,MelbourneSK32Y201219/08/20121Adultvc57_danes_bc_data
Yponomeuta rorrellaDuffield Rd, Allestree, DerbySK34K201227/07/20121Adultvc57_danes_bc_data
Yponomeuta rorrellaDovedaleSK15K201101/08/20111Adultvc57_danes_bc_data
Yponomeuta rorrellaDovedaleSK15K201101/08/20111Adultvc57_danes_bc_data
Yponomeuta rorrellaDovedaleSK15K201101/08/20111Adultvc57_danes_bc_data
Yponomeuta rorrellaRobin Wood (central area)SK32M200804/08/20081Adultvc57_danes_bc_data

 
Yponomeuta cagnagella       Yponomeuta plumbella

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