The Anomalous - 16th August 2026 - Glossop - Christian Heintzen
73.061 BF2394  – The Anomalous  – Stilbia anomala  – (Haworth, 1812)
Adult Macro:  CAT 2 – Can be confused with other species – Good photographs may be required – Can be confused with other species      
PDF Icon – click for Adult Macro Verification Guidelines

Brown –  Significant Record / Rare / Vagrant    
Taxonomy:   Macro  >>.  >>  Noctuidae  >> Oncocnemidinae
** Photograph required **
Other Name/s: False Footman
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species:  No similar Derbyshire species
ID pointers: The forewings are narrow at the base and widen towards the outer edge, usually displaying a mauve-grey or brownish-grey colouration. There is a distinctive dark V-shaped mark situated between the stigmata and the wings appear narrow and held tightly over the body. Hind-wings are pale white or light grey, accented by fine, dark veining.
Distribution: 

A very rare species, thought to be possibly extinct in the county or only holding on in a very isolated population, such as in Dovedale where it was last recorded in 2011. It is predominantly a moorland species.

First recorded in 1866 from an undetermined site in Findern. By 1986 only four records were known, with the last one being recorded in 1975. Since only four records of 5 individuals all recorded from Dovedale by the same recorder. Two in 2010 and two in 2011. 

An adult was attracted to light at Glossop on 16/8/2026 and recorded by Christian Heintzen, resurrecting this species and putting it truly back on the Derbyshire Map, after an absence of 15 years.  

General Comment: None
Flight Period: August /  September –  August – September Moth Activity: Nocturnal   – and is attracted to light Photographed: Yes –   Photographed By: Christian Heintzen  © All Rights Reserved
*** Last updated on 17 August 2026 by RP ***
Wingspan: 29-36mm
Forewing: 13-17mm
Food Plant: Wavy hair-grass (Deschampsia flexuosa).
Last Recorded Year: 2026
First Recorded Year: 1866
Last Recorded By – Christian Heintzen
Last Recorded General Area – Glossop

Possible Future Content


Images of Interest



Temporal Distribution Chart
Adults: (between 1947 - 2011)
(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.


Changes in First and Last Recorded Activity Dates Over Time
Activity Data Range: 1947 – 2011
Earliest Appearance: 1st August (in 1947)
Latest Appearance: 17th September (in 1963)
This chart presents a time-series summary of recorded observations. It is based on available records at the time of analysis and will evolve as further data are added. The rolling mean provides a smoothed representation of variation in recorded activity over time. Annual record totals are shown for context; years with fewer records may provide a less complete representation of activity than years with higher recording intensity. Interpretation should consider that apparent trends may reflect both biological change and variation in recording effort.

Distribution Map for Stilbia anomala

Found 11 records
    ↳ from 2026+
    ↳ from 2020 - 2025
    ↳ 11 from Before 2020
Flying
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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 – Stilbia anomala

⚠️ 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.

Visit NBN Site


Monthly Records By Year: Stilbia anomala
( data includes both Larvae and Adult Stages )

Monthly Counts By Year: Stilbia anomala
( data is based on 'Adult' stage records only )

First/Last Recorded Dates: Stilbia anomala
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: Stilbia anomala
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Stilbia anomala
AGR: 50%   |   Total % Change: 50%

Hectad (10kmx10km) Coverage: Stilbia anomala
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Stilbia anomala

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 - Stilbia anomala – 11 records available

Listed by Year - descending - scroll across to see all table columns

Site Name Tetrad Date Count Stage Recorder Source RecordKey
Dovedale SK15K 29/08/2011 1 Adult David Grundy vc57_danes_bc_data LC000334001OL40X
Dovedale SK15K 29/08/2011 2 Adult David Grundy vc57_danes_bc_data LC000334001OL41G
Dovedale SK15K 15/08/2010 1 Adult David Grundy vc57_danes_bc_data LC000334001OJQAS
Dovedale SK15K 15/08/2010 1 Adult David Grundy vc57_danes_bc_data LC000334001OK4VM
Wolds Rise, Cavendish Rd, Matlock SK36A 14/08/1975 1 Adult B.L. Statham vc57_danes_bc_data LC000334001OIJDL
Slagmill Plantation,Beeley Moor SK36E 17/09/1963 1 Adult VC57 Derbyshire Recorder vc57_danes_bc_data LC000334001OIH64
Newbold Rd, Chesterfield SK37R 19/08/1962 1 Adult VC57 Derbyshire Recorder vc57_danes_bc_data LC000334001OIH01
Taxal, Whaley Bridge (site not precise) SK07E 01/08/1947 1 Adult H.N. Michaelis vc57_danes_bc_data LC000334001OIDBQ
Taxal, Whaley Bridge (site not precise) SK07E 01/08/1947 1 Adult H.N. Michaelis vc57_danes_bc_data LC000334001WOSKC
Findern, Derby (site not precise) SK33A 01/01/1866 1 Adult [VC57 Recorder] vc57_danes_bc_data LC000334001TAGFG
Findern, Derby (site not precise) SK33A 01/01/1866 1 Adult F.M. Spilsbury vc57_danes_bc_data LC000334001WPU3D

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