– click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Significant Record / Very Rare / Vagrant
– care required in the identification process, as confusion with similar species is likely – quality photographs required. Confusion Species: Similar to other Agonopterix sp.
Image Gallery
No gallery images found for this moth.
Distribution Map for Agonopterix assimilella
↳ 1 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 – Agonopterix assimilella
⚠️ 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:
Agonopterix assimilella
( data includes both Larvae and Adult Stages )
Monthly Counts By Year: Agonopterix assimilella
( data is based on 'Adult' stage records only. )
First/Last Recorded Dates: Agonopterix assimilella
Adult-only & Anything [Larvae, Pupae, Adult, Mines]
Shading shows moth presence between dates
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Recordings By Year: Agonopterix assimilella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Agonopterix assimilella
AGR: 0% | Total % Change: 0%
Agonopterix assimilella
Insufficient records/data for an AGR analysis
Agonopterix assimilella
Insufficient records/data for a CUSUM analysis
Hectad (10kmx10km) Coverage: Agonopterix assimilella
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Agonopterix assimilella
Agonopterix assimilella
( 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 - Agonopterix assimilella – 2 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Source |
|---|---|---|---|---|---|
| Markham Vale South Tip | SK47K | 13/02/2025 | 1 | larva | vc57_irecords_extract |
| Buxton SK, UK | SK07S | 01/08/2020 | 1 | Adult | vc57_irecords_extract |