70.145 BF1861 - Bilberry Pug - Geometridae - Larentinae - Pasiphila debiliata
70.145 BF1861  – Bilberry Pug  – Pasiphila debiliata  – (Hübner, [1817])
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

Green –  Rare / Uncommon / Scarce   
Taxonomy:   Macro  >>.  >>  Geometridae  >> Larentinae
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species:  Green Pug
ID pointers: Has full deep rather rounded wings and arched leading forewing edge. A delicate pale lime green, when fresh. A black central spot with two faint cross-bands towards the wing base and after the spot. With another wavy cross-band at two-thirds. Several black dashes along the costa. The green fades to a light brown.
Distribution:  (Last record: 2024 )  –  A new species for the county, with 2 specimens netted during the day over Bilberry at Long Clough near Glossop on 1st July 2023. Another one was attracted to light at the same site on 2nd July 2023. The species has most probably been under-recorded, due to its precise habitat requirements. 
General Comment: None
Flight Period: June /  July –  On the wing June-July. Easily flushed from the larval food plant – Bilberry. Moth Activity: Nocturnal   – and is attracted to light Photographed: Yes –  Photographed By: Christian Heintzen  © All Rights Reserved
*** Last updated on 13 January 2026 by TD ***
Forewing: 9-11mm Food Plant: Bilberry.
Last Recorded Year: 2024
Last Recorded By – Not Recorded
Last Recorded General Area – Not Recorded

Selected Images:  1st July, Long Clough, near Glossop, Derbyshire – Images by Christian Heintzen © 
 



Temporal Distribution Chart
Adults: (between 2023 - 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 Pasiphila debiliata

Found 8 records
    ↳ from 2026+
    ↳ 8 from 2020 - 2025
    ↳ from Before 2020
Flying
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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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 – Pasiphila debiliata

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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.

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Monthly Records By Year: Pasiphila debiliata
( data includes both Larvae and Adult Stages )

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

First/Last Recorded Dates: Pasiphila debiliata
Adult-only & Anything [Larvae, Pupae, Adult, Mines]

Shading shows moth presence between dates

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Recordings By Year: Pasiphila debiliata
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Pasiphila debiliata
AGR: -18.35%   |   Total % Change: -33.3%

Hectad (10kmx10km) Coverage: Pasiphila debiliata
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Pasiphila debiliata

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 - Pasiphila debiliata – 8 records available

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

Site Name Tetrad Date Count Stage Recorder Source RecordKey
Derbyshire Wild Life Trust Long Clough, Herod Clough SK09G 11/07/2025 1 adult Heintzen, Christian vc57_irecords_extract iBRC43980144
Derbyshire Wild Life Trust Long Clough SK09G 27/06/2025 1 adult Heintzen, Christian vc57_irecords_extract iBRC43979708
Glossop, Gnat Hole Rough Fields SK09L 24/06/2025 1 adult Heintzen, Christian vc57_irecords_extract iBRC43979618
Derbyshire Wild Life Trust Long Clough, Herod Clough SK09G 20/06/2025 1 adult Heintzen, Christian vc57_irecords_extract iBRC43979591
Derbyshire Wild Life Trust Long Clough SK09G 05/07/2024 1 adult Heintzen, Christian vc57_irecords_extract iBRC38130360
Glossop, Shawmoor Plantation SK09F 28/06/2024 1 adult Heintzen, Christian vc57_irecords_extract iBRC36773575
[sensitive record, location hidden] SK09G 02/07/2023 1 adult Heintzen, Christian vc57_irecords_extract iBRC36283597!
[sensitive record, location hidden] SK09G 01/07/2023 2 adult Heintzen, Christian vc57_irecords_extract iBRC36283585!

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