Ostrinia nubilalis       Udea lutealis
63.031 BF1395  –  Crambidae –  Spilomelinae – Udea ferrugalis – Rusty Dot Pearl – (Hübner, 1796) Adult Micro:  CAT 1 – Distinctive Species –       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Green –  Rare / Uncommon / Scarce       orange – Migrant
Taxonomy:   Micro   >>  Crambidae  >> Spilomelinae
ID Difficulty:  green  – easy to identify, generally distinctive and unlikely to be confused with other species.
ID pointers: The orange rusty-brown ground colour, black markings and two black spots in each forewing make this an easy pyralid to identify. Note also the white legs.
Distribution:  A regular migrant species recorded in small numbers during the autumn.
Flight Period: August /  September /  October /  –  Usually occurs during August – November. Moth Activity: Nocturnal   – and is attracted to light Photographed: Yes –  Photographed By: Tony Davison  © All Rights Reserved
*** Last updated on 21 June 2025 by TD ***
Wingspan: 18-22mm
 Food Plant: Herbaceous plants.
Last Recorded By – Not Recorded
Last Recorded General Area – Not Recorded
IMAGES BELOW:  Melbourne, Derbyshire – Tony Davison© 

Udea ferrugalis - Rusty Dot Pearl
Udea ferrugalis – Rusty Dot Pearl
Rusty Dot Pearl
Udea ferrugalis – Rusty Dot Pearl
Udea ferrugalis - Rusty Dot Pearl
Rusty Dot Pearl

63.031 BF1395 - Rusty Dot Pearl 9159592 63.031 BF1395 - Udea ferrugalis - Rusty Dot Pearl - 16th October 2014 - Melbourne, Derbyshire - Tony Davison©
63.031 BF1395-udea-ferrugalis 63.031 BF1395 - Udea ferrugalis - Rusty Dot Pearl 12th October 2011- Melbourne, Derbyshire - Tony Davison©

Distribution Map for Udea ferrugalis

Found 118 records
    ↳ 31 from After 2025
    ↳ 41 from 2020 - 2024
    ↳ 46 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 – Udea ferrugalis

⚠️ 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: Udea ferrugalis
( data includes both Larvae and Adult Stages )

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


First/Last Recorded Dates: Udea ferrugalis
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: Udea ferrugalis
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Udea ferrugalis
AGR: 0.26%   |   Total % Change: 6.5%


CUSUM Analysis: Udea ferrugalis
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 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 2019, 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: Udea ferrugalis
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Udea ferrugalis
( 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 - Udea ferrugalis – 118 records available

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

Site NameTetradDateCountStageSource
Netherside Drive, Chellaston, DerbySK33V02/09/20251adultvc57_irecords_extract
Wingerworth, DerbyshireSK36Y04/09/20251adultvc57_irecords_extract
Wingerworth, DerbyshireSK36Y05/09/20251adultvc57_irecords_extract
Aston-on-Trent, DerbyshireSK43A06/09/20251adultvc57_irecords_extract
findern, derbyshireSK33A05/09/20251adultvc57_irecords_extract
findern, derbyshireSK33A07/09/20252adultvc57_irecords_extract
Chellaston, Derby, DerbySK33V08/09/20251adultvc57_irecords_extract
Chellaston, Derby, DerbySK33V02/09/20251adultvc57_irecords_extract
Findern, DerbyshireSK33A11/08/20251adultvc57_irecords_extract
Long eaton, Wensleydale RoadSK43R16/08/20251adultvc57_irecords_extract
Allestree, DerbySK33P16/08/20251adultvc57_irecords_extract
BelperSK34N20/08/20251adultvc57_irecords_extract
sheffieldSK38M15/08/20251adultvc57_irecords_extract
Inkersall gardenSK47G23/08/20251adultvc57_irecords_extract
Littleove, DerbySK33G22/08/20251adultvc57_irecords_extract
BelperSK34U23/08/20251adultvc57_irecords_extract
Stoney Clouds, meadowSK43T23/08/20251adultvc57_irecords_extract
upper cromford gardenSK25Y18/08/20251adultvc57_irecords_extract
Findern, DerbyshireSK33A24/08/20252adultvc57_irecords_extract
Allestree, DerbySK33P27/08/20251adultvc57_irecords_extract
Ingleby Ave, DerbySK33L26/08/20251adultvc57_irecords_extract
Findern, DerbyshireSK33A27/08/20251adultvc57_irecords_extract
Chaddesden, DerbySK33T23/08/20251adultvc57_irecords_extract
Inkersall gardenSK47G30/08/20251adultvc57_irecords_extract
findern, derbyshireSK33A29/08/20251adultvc57_irecords_extract
Ilkeston, DerbyshireSK44K29/08/20251adultvc57_irecords_extract
Melbourne, DerbyshireSK32X01/07/20251adultvc57_irecords_extract
Midway, Derbys.SK32A13/07/20251adultvc57_irecords_extract
Findern, DerbyshireSK33A13/07/20251adultvc57_irecords_extract
BelperSK34N24/07/20251adultvc57_irecords_extract
Ladycroft Ave, BuxtonSK07S30/06/20251adultvc57_irecords_extract
Old Park Plantation, BeeleySK26U03/11/20241Adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A01/11/20241adultvc57_irecords_extract
Belper, DerbyshireSK34N24/10/20242adultvc57_irecords_extract
Lower Cromford GardenSK25Y11/08/20241adultvc57_irecords_extract
BelperSK34U12/08/20241adultvc57_irecords_extract
Woodland AveSK43R08/10/20231adultvc57_irecords_extract
Shirland - Hallfieldgate LaneSK35Z29/10/20231Adultvc57_irecords_extract
SandiacreSK43T08/10/20231adultvc57_irecords_extract
Ladycroft AveSK07S08/10/20231adultvc57_irecords_extract
Ladycroft AveSK07S18/10/20231adultvc57_irecords_extract
BelperSK34U09/10/20231adultvc57_irecords_extract
Morley RetreatSK34V06/09/20231adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y14/09/20231Adultvc57_irecords_extract
Belper GardenSK34P03/09/20231adultvc57_irecords_extract
Findern GardenSK33A06/09/20231Adultvc57_irecords_extract
Findern GardenSK33A17/09/20231Adultvc57_irecords_extract
Findern GardenSK33A30/09/20231Adultvc57_irecords_extract
Ladycroft AveSK07S08/09/20231adultvc57_irecords_extract
Ladycroft AveSK07S17/09/20231adultvc57_irecords_extract
Birch ValeSK08I23/10/20221adultvc57_irecords_extract
Hathersage, Derbyshire, UKSK28F20/08/20221adultvc57_irecords_extract
Derbyshire, England, United KingdomSK07S04/08/20221Adultvc57_irecords_extract
Buxton SK, UKSK07S22/08/20221Adultvc57_irecords_extract
Derbyshire, England, United KingdomSK07S29/08/20221Adultvc57_irecords_extract
Woodland AveSK43R19/08/20221adultvc57_irecords_extract
Woodland AveSK43R26/08/20221adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y27/08/20221Adultvc57_irecords_extract
Long Eaton - Marlborough RoadSK43X05/08/20221Adultvc57_irecords_extract
Ladycroft Ave, BuxtonSK07S21/08/20221adultvc57_irecords_extract
Ladycroft Ave, BuxtonSK07S24/08/20221adultvc57_irecords_extract
Ladycroft AveSK07S26/08/20222adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A03/08/20221adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A23/08/20221adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A26/08/20221adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A25/07/20221adultvc57_irecords_extract
Buxton SK, UKSK07S09/10/20211Adultvc57_irecords_extract
Long Eaton - Marlborough RoadSK43X16/10/20211Adultvc57_irecords_extract
Allestree, DerbySK33P14/10/20211adultvc57_irecords_extract
Briar Close, Newhall, SwadlincoteSK22V16/10/20211adultDanes_2019-2021
Midway, Derbys.SK32A10/08/20211adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A09/11/20202adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A14/09/20191adultvc57_irecords_extract
The Mays, Malthouse Lane, FroggattSK27N31/08/20191adultDanes_2019-2021
Main Street, Kings NewtonSK32Y15/07/20191Adultvc57_irecords_extract
Norton LeesSK38L16/07/20191adultDanes_2019-2021
Main Street, Kings NewtonSK32Y07/09/20171Adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y05/09/20171Adultvc57_irecords_extract
Birch ValeSK08I07/08/20171adultvc57_irecords_extract
Backgarden MarehaySK34Z06/09/20161adultvc57_irecords_extract
Backgarden MarehaySK34Z30/08/20161adultvc57_irecords_extract
BelperSK34U13/09/20151adultvc57_irecords_extract
Ladycroft AveSK07S22/11/20141adultvc57_irecords_extract
Melbourne, DerbyshireSK32X16/10/20141adultvc57_irecords_extract
Shirland - Hallfieldgate LaneSK35Z30/10/20141Adultvc57_irecords_extract
Elgar Drive,Sawley,Long EatonSK43R09/11/20111Adultvc57_danes_bc_data
Melbourne, DerbyshireSK32X12/10/20111adultvc57_irecords_extract
Backgarden MarehaySK34Z09/10/20111adultvc57_irecords_extract
School Close,Parkway Gardens,Darley DaleSK26R12/10/20111Adultvc57_danes_bc_data
Spinney Hill,MelbourneSK32X13/10/20111Adultvc57_danes_bc_data
Bamford St,RipleySK34Z09/10/20111Adultvc57_danes_bc_data
Backgarden MarehaySK34Z19/09/20111adultvc57_irecords_extract
Bamford St,RipleySK34Z19/09/20111Adultvc57_danes_bc_data
Ladycroft Ave,BuxtonSK07S23/09/20111Adultvc57_danes_bc_data
Buxton SK, UKSK07S08/07/20111Adultvc57_irecords_extract
Buxton SK, UKSK07S08/07/20111Adultvc57_irecords_extract
DovedaleSK15K11/07/20111Adultvc57_danes_bc_data
George St,BelperSK34N10/07/20111Adultvc57_danes_bc_data
DovedaleSK15K11/07/20111Adultvc57_danes_bc_data
The Mays,Malthouse Lane,FroggattSK27N11/08/20071Adultvc57_danes_bc_data
Edgecote Drive,Newhall,SwadlincoteSK22V24/10/20061Adultvc57_danes_bc_data
Melbourne, DerbyshireSK32X15/09/20061adultvc57_irecords_extract
Main Street, Kings NewtonSK32Y14/09/20061Adultvc57_irecords_extract
Edgecote Drive,Newhall,SwadlincoteSK22V15/09/20061Adultvc57_danes_bc_data
Spinney Hill,MelbourneSK32X15/09/20061Adultvc57_danes_bc_data
Midway Rd,Midway,SwadlincoteSK32A24/09/20061Adultvc57_danes_bc_data
Edgecote Drive,Newhall,SwadlincoteSK22V01/09/20061Adultvc57_danes_bc_data
Main St,Kings Newton,MelbourneSK32Y14/09/20061Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R10/11/20011Adultvc57_danes_bc_data
Shipley Hill, Shipley Park, IlkestonSK44H03/09/19961Adultvc57_danes_bc_data
Deerlands Rd, Ashgate, ChesterfieldSK37K10/08/19961Adultvc57_danes_bc_data
Deerlands Rd, Ashgate, ChesterfieldSK37K10/08/19961Adultvc57_danes_bc_data
Deerlands Rd, Ashgate, ChesterfieldSK37K13/06/19961Adultvc57_danes_bc_data
Repton (site not precise)SK32B20/09/19811Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F20/07/19811Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F22/07/19811Adultvc57_danes_bc_data
Threepieces, Veron Lane, Kelstedge, AshoverSK36G03/10/19791Adultvc57_danes_bc_data
Main St,Kings Newton,MelbourneSK32Y25/06/19051Adultvc57_danes_bc_data

Ostrinia nubilalis       Udea lutealis

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