16.015 BF437 – Birch Drab – Swammerdamia caesiella – (Hübner, 1796)
Adult Micro: CAT 2 – Can be confused with other species –
– click for General Verification Guidelines | – click for Specific Verification Guidelines
– click for General Verification Guidelines | – click for Specific Verification Guidelines 
– Uncertain/Unknown – Insufficient Data
– care required in the identification process, as confusion with similar species is likely – quality photographs required. Confusion Species: Paraswammerdamia nebulella. Poorly marked / worn examples required Gen Det. Grade 4
ID pointers: A tiny nondescript micro.Head whitish or brownish. Forewing a dull grey with a pallid darker brownish cross-band about half way and a dark spot on the costa near to the apex.
Distribution: (Last record: 8 July 2021 at Drakelow WR ) – Uncertain/unknown due to lack of data – In Britain it is common and widespread in woodland and on heathland.
General Comment: None *** Last updated on 2 October 2025 by RP ***
Last Recorded Year: 2021
Last Recorded By – iRecord data
Last Recorded General Area – Drakelow WR
Selected Images: Melbourne, Derbyshire – Tony Davison ©
Image Gallery
No gallery images found for this moth.
Temporal Distribution Chart
Adults: (between 2010 - 2025) | Immatures: (between 2009 - 2010)
(click legend below to show/hide datasets)
This chart summarises all available historical occurrence records collated by ISO week of the year. It reflects recorder effort and sampling distribution as well as true biological activity, and should be interpreted as an indicative pattern of seasonal occurrence rather than a statistically controlled abundance or phenology model.
Distribution Map for Swammerdamia caesiella
Found 14 records
↳ from 2026+
↳ 5 from 2020 - 2025
↳ 9 from Before 2020
↳ from 2026+
↳ 5 from 2020 - 2025
↳ 9 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 – Swammerdamia caesiella
⚠️ 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:
Swammerdamia caesiella
( data includes both Larvae and Adult Stages )
Monthly Counts By Year:
Swammerdamia caesiella
( data is based on 'Adult' stage records only )
First/Last Recorded Dates: Swammerdamia caesiella
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: Swammerdamia caesiella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Swammerdamia caesiella
AGR: 0% | Total % Change: 0%
Hectad (10kmx10km) Coverage: Swammerdamia caesiella
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Swammerdamia caesiella
Swammerdamia caesiella
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 2020-2026.
Records Behind the Map and Charts - Swammerdamia caesiella – 14 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Recorder | Source | RecordKey |
|---|---|---|---|---|---|---|---|
| Woodland Ave | SK43R | 15/06/2025 | 1 | adult | Thorpe, Steve | vc57_irecords_extract | iBRC48390869 |
| Buxton SK, UK | SK07S | 17/07/2021 | 1 | Adult | Orridge, Steve | vc57_irecords_extract | iBRC22889807 |
| Not given | SK22F | 08/07/2021 | 1 | Adult | Williams, Michael | vc57_irecords_extract | iBRC21019983 |
| Drakelow, Derbys. | SK22F | 08/07/2021 | 1 | adult | Williams, Michael | vc57_irecords_extract | iBRC38545826 |
| Melbourne, Derbyshire | SK32X | 07/08/2020 | 1 | adult | Davison, Tony | vc57_irecords_extract | iBRC33554788 |
| Buxton SK, UK | SK07S | 17/07/2013 | 1 | Adult | Orridge, Steve | vc57_irecords_extract | iBRC33143344 |
| Ladycroft Ave | SK07S | 16/07/2013 | 1 | adult | Orridge, Steve | vc57_irecords_extract | iBRC40990988 |
| Findern Close, Belper | SK34P | 24/07/2012 | 1 | Adult | D. Evans | vc57_danes_bc_data | LC000334001CP85O |
| Findern Close, Belper | SK34P | 23/07/2012 | 1 | Adult | D. Evans | vc57_danes_bc_data | LC000334001CP84B |
| Thorpe, Dovedale | SK15K | 13/10/2010 | 1 | Larval Feeding Signs | S.A. Orridge;S.H. Hind | vc57_danes_bc_data | LC000334001COTQZ |
| Ladybower Resr | SK18U | 03/09/2010 | 1 | Larval Feeding Signs | S.H. Hind | vc57_danes_bc_data | LC000334001COXJ5 |
| Slippery Stones,Upper Derwent | SK19S | 25/08/2010 | 1 | Larvae | S.H. Hind | vc57_danes_bc_data | LC000334001CP6J9 |
| Rose Av,Clowne | SK57D | 10/08/2010 | 1 | Adult | D. Hursthouse | vc57_danes_bc_data | LC000334001COXFJ |
| Norbury | SK14G | 01/10/2009 | 1 | Larvae | Dave Budworth;S.A. Orridge;S.H. Hind | vc57_danes_bc_data | LC000334001COWYD |