– click for Adult Macro Verification Guidelines
– Significant Record / Very Rare / Vagrant
– care required in the identification process, as confusion with similar species is likely – quality photographs required. ID pointers: A very distinctive species. Ground colour of upper wings is a straw yellow which is covered in dense dark brown flecking and speckling. The large, rather square pale patch near outer edge of forewing is diagnostic.
Distribution: (First record: 17 May 2024 at Rosliston Forest Centre ) – (Last record: 3 July 2025 at Belper ) – A new species for the county. One trapped at Rosliston Forest Centre Moth event on 17th May 2024 by Neil Ward.2nd record from Darwin Forest 3/7/2025.
*** Last updated on 2 October 2025 by RP ***
Forewing: 17-20mm
Last Recorded Year: 2025
First Recorded Year: 2024
Last Recorded By – Dave Evans
Last Recorded General Area – Belper
Selected Images: Rosliston Forest Centre, Derbyshire – Image by kind permission of Neil Ward © / Darwin Forest 2nd VC57 3/7/2025-Dave Evans©
Image Gallery
Distribution Map for Parectropis similaria
Found 3 records
↳ 2 from After 2025
↳ 1 from 2020 - 2024
↳ 0 from Before 2020
↳ 2 from After 2025
↳ 1 from 2020 - 2024
↳ 0 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 – Parectropis similaria
⚠️ 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:
Parectropis similaria
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Parectropis similaria
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Parectropis similaria
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: Parectropis similaria
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Parectropis similaria
AGR: 0% | Total % Change: 0%
CUSUM Analysis: Parectropis similaria
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 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: Parectropis similaria
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Parectropis similaria
Parectropis similaria
( 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 - Parectropis similaria – 3 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Darwin Forest | SK26X | 04/07/2025 | 1 | adult | vc57_irecords_extract |
| Darwin Forest | SK26X | 03/07/2025 | 1 | adult | vc57_irecords_extract |
| Rosliston, Derbyshire | SK21N | 17/05/2024 | 1 | adult | vc57_irecords_extract |