– click for Adult Macro Verification Guidelines
– Significant Record / Very Rare / Vagrant 
– Migrant
– care required in the identification process, as confusion with similar species is likely – quality photographs required. Confusion Species: Silver Y
ID pointers: Resembles the Silver Y and could easily be over looked. It is more attractively marked with a lighter brown forewing. The central silver “Y” shaped mark is broken in two usually forming an “n” shape with a blob above it, like a detached tail of the “y” shape.
Distribution: (First record: 10 August 1996 at Chesterfield ) – (Last record: 20 August 2025 at Cromford ) – A rare migrant to Britain from Southern Europe / North Africa.The 2nd record for Derbyshire, trapped in a garden in Melbourne July 28th 2006, arrived during a spell of very hot weather from the south. 3rd county record Allestree 15/8/2025. 4th county record 20/8/2025 Cromford.
*** Last updated on 2 October 2025 by RP ***
Forewing: 15-17mm
Last Recorded Year: 2025
First Recorded Year: 1996
Last Recorded By – Clive Ashton
Last Recorded General Area – Cromford
Selected Images: Melbourne, Derbyshire (2nd record) – Tony Davison © / Allestree (3rd record) 15/8/25 – Stephen Plant©/ 20/8/2025 Cromford (4th record) – Clive Ashton©
Image Gallery
Distribution Map for Trichoplusia ni
Found 6 records
↳ 2 from After 2025
↳ 0 from 2020 - 2024
↳ 4 from Before 2020
↳ 2 from After 2025
↳ 0 from 2020 - 2024
↳ 4 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.
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 – Trichoplusia ni
⚠️ 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.
Monthly Records By Year:
Trichoplusia ni
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Trichoplusia ni
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Trichoplusia ni
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: Trichoplusia ni
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Trichoplusia ni
AGR: 0% | Total % Change: 0%
CUSUM Analysis: Trichoplusia ni
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 24 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 2006, 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: Trichoplusia ni
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Trichoplusia ni
Trichoplusia ni
( 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 - Trichoplusia ni – 6 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Allestree, Derby | SK33P | 16/08/2025 | 1 | adult | vc57_irecords_extract |
| upper cromford garden | SK25Y | 20/08/2025 | 1 | adult | vc57_irecords_extract |
| Melbourne, Derbyshire | SK32X | 28/07/2006 | 1 | adult | vc57_irecords_extract |
| Spinney Hill,Melbourne | SK32X | 28/07/2006 | 1 | Adult | vc57_danes_bc_data |
| Spinney Hill,Melbourne | SK32X | 28/07/2006 | 1 | Adult | vc57_danes_bc_data |
| Deerlands Rd, Ashgate, Chesterfield | SK37K | 10/08/1996 | 1 | Adult | vc57_danes_bc_data |