72.037 BF2035 – Round-winged Muslin – Thumatha senex – (Hübner, 1808)
Adult Macro: CAT 1 – Distinctive species unlikely to be confused with others –
– click for Adult Macro Verification Guidelines
– click for Adult Macro Verification Guidelines
– Rare / Uncommon / Scarce
– easy to identify, generally distinctive and unlikely to be confused with other species.ID pointers: A small and delicate looking moth, that is cream-coloured with very broad and rounded, slightly translucent wings. The forewing has a small and noticeable dark central dot and usually two rows of dark spots or dashes.
Distribution: (Last record: 11 July 2025 at Chaddesden ) – Lastest record in 2024 – A new species for Derbyshire in 2016 when one was recorded in a garden trap in Belper. The record was submitted but never published. Steve Thorpe trapped a single individual in his garden moth trap at Breaston on 30th June 2020, then a further 19 in 2021, and a further 3 in 2022, all from the same site. Another single individual by Steve at Breaston overnight on 30th June 2023 and another from a garden moth trap in Sandiacre late June 2023. Steve’s garden backs onto Golden Brook Nature Reserve at Breaston, clearly this is a “Hotspot” for this species, and maybe the main site in the county.
General Comment: None *** Last updated on 24 February 2026 by TD ***
Forewing: 10-11mm
Last Recorded Year: 2025
Last Recorded By – Martin Roome
Last Recorded General Area – Chaddesden
Selected Images: Breaston 2020 and Breaston 2023 – By Steve Thorpe © / Glossop 29/6/2025 – Christian Heintzen©
Image Gallery
No gallery images found for this moth.
Temporal Distribution Chart
Adults: (between 2012 - 2025)
(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 Thumatha senex
Found 25 records
↳ from 2026+
↳ 22 from 2020 - 2025
↳ 3 from Before 2020
↳ from 2026+
↳ 22 from 2020 - 2025
↳ 3 from Before 2020
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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 – Thumatha senex
⚠️ 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:
Thumatha senex
( data includes both Larvae and Adult Stages )
Monthly Counts By Year:
Thumatha senex
( data is based on 'Adult' stage records only )
First/Last Recorded Dates: Thumatha senex
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: Thumatha senex
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Thumatha senex
AGR: -8.1% | Total % Change: -66.7%
Hectad (10kmx10km) Coverage: Thumatha senex
( data includes both Larvae and Adult Stages )
Flight Periods – Indicative –vs– Recorded Data
Thumatha senex
Thumatha senex
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 - Thumatha senex – 25 records available
Listed by Year - descending - scroll across to see all table columns
| Site Name | Tetrad | Date | Count | Stage | Recorder | Source | RecordKey |
|---|---|---|---|---|---|---|---|
| Chaddesden, Derby | SK33T | 11/07/2025 | 1 | adult | roome, martin | vc57_irecords_extract | iBRC44160172 |
| Glossop, Hague Street, Hay Meadow | SK09G | 29/06/2025 | 1 | adult | Heintzen, Christian | vc57_irecords_extract | iBRC43979863 |
| Woodland Ave | SK43R | 27/06/2025 | 1 | adult | Thorpe, Steve | vc57_irecords_extract | iBRC48391171 |
| Chaddesden Garden | SK33T | 19/06/2025 | 1 | adult | loverock, neil | vc57_irecords_extract | iBRC42662409 |
| Buxton SK, UK | SK07S | 10/07/2023 | 1 | Adult | Orridge, Steve | vc57_irecords_extract | iBRC31455392 |
| Ladycroft Ave | SK07S | 09/07/2023 | 1 | adult | Orridge, Steve | vc57_irecords_extract | iBRC35076144 |
| Sandiacre | SK43T | 08/07/2023 | 2 | adult | Milnes, Emily | vc57_irecords_extract | iBRC34430467 |
| Woodland Ave | SK43R | 07/07/2023 | 2 | adult | Thorpe, Steve | vc57_irecords_extract | iBRC33496716 |
| Woodland Ave | SK43R | 30/06/2023 | 7 | adult | Thorpe, Steve | vc57_irecords_extract | iBRC33496622 |
| Sandiacre | SK43T | 25/06/2023 | 1 | adult | Milnes, Emily | vc57_irecords_extract | iBRC34377407 |
| Jim Mart Nature Reserve | SK36S | 24/06/2023 | 1 | Adult | Mahadevan, Nikki | vc57_irecords_extract | iBRC34929864 |
| Woodland Ave | SK43R | 23/06/2023 | 1 | adult | Thorpe, Steve | vc57_irecords_extract | iBRC33496548 |
| Woodland Ave | SK43R | 19/07/2022 | 1 | Adult | Thorpe, Steve | vc57_irecords_extract | iBRC27846290 |
| Woodland Ave | SK43R | 16/07/2022 | 1 | Adult | Thorpe, Steve | vc57_irecords_extract | iBRC27846153 |
| Woodland Ave | SK43R | 25/06/2022 | 1 | Adult | Thorpe, Steve | vc57_irecords_extract | iBRC27845941 |
| Woodland Ave | SK43R | 20/07/2021 | 7 | adult | Thorpe, Steve | vc57_irecords_extract | iBRC33499003 |
| Woodland Ave | SK43R | 18/07/2021 | 8 | adult | Thorpe, Steve | vc57_irecords_extract | iBRC33498872 |
| Not given | SK22F | 08/07/2021 | 3 | Adult | Williams, Michael | vc57_irecords_extract | iBRC21020037 |
| Drakelow, Derbys. | SK22F | 08/07/2021 | 3 | adult | Williams, Michael | vc57_irecords_extract | iBRC38545880 |
| Woodland Ave | SK43R | 08/07/2021 | 4 | adult | Thorpe, Steve | vc57_irecords_extract | iBRC33498723 |
| Buxton SK, UK | SK07S | 01/08/2020 | 1 | Adult | Orridge, Steve | vc57_irecords_extract | iBRC33155870 |
| Woodland Ave | SK43R | 30/06/2020 | 1 | adult | Thorpe, Steve | vc57_irecords_extract | iBRC33501331 |
| Findern Close, Belper | SK34P | 24/07/2012 | 3 | Adult | D. Evans | vc57_danes_bc_data | LC000334001OK9HO |
| Ashbourne (site not precise) | SK14T | 01/01/1911 | 1 | Adult | [VC57 Recorder] | vc57_danes_bc_data | LC000334001TAG8B |
| Ashbourne (site not precise) | SK14T | 01/01/1911 | 1 | Adult | H.F. Gibson | vc57_danes_bc_data | LC000334001WOSJM |