70.115 BF1873  –  Geometridae –  Larentiinae – Venusia cambrica – Welsh Wave – (Curtis, 1839) Adult Macro:  CAT 2 – Can be confused with other species – Can be confused with other species       PDF Icon – click for Adult Macro Verification Guidelines

Green –  Rare / Uncommon / Scarce   
Taxonomy:   Macro   >>  Geometridae  >> Larentiinae
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species:  Waved Carpet
ID pointers: Characterised by a pair of blackish spikes projecting from the centre of the post median cross-line. Ground colour is usually a whitish-grey. There is a dark form bradyi, where forewing is a dark-grey and most of the markings are obscured. Waved Carpet (Hydrelia sylvata) is similar but with cross-lines less distinct and lacking the pair of spikes.
Distribution:  (Last record: 11 July 2025 at Cromford )  –  Very few records of this species, only six since 2010. It is a resident of the woodlands of the upland gritstone areas, where it can be numerous amongst the Rowan. It may just be under-recorded. One from Cromford 11/7/2025
Flight Period: July /  August /  –  On the wing – July – August Moth Activity: Nocturnal   – but often seen by day Photographed: Yes –  Photographed By: Christian Heintzen, Graham Finch, Tony Sinnott, Clive Ashton  © All Rights Reserved
*** Last updated on 2 October 2025 by RP ***
Wingspan: 27-30mm
Food Plant: Rowan (Sorbus aucuparia).
Last Recorded Year: 2025
Last Recorded By – Clive Ashton
Last Recorded General Area – Cromford

Selected Images:  Wildboar Clough, Longdendale, Derbyshire 07/07/2023 – Christian Heintzen ©    /   Matlock, Derbyshire 23/06/2005 Graham Finch © / Cromford (2025) Clive Ashton©



Distribution Map for Venusia cambrica

Found 42 records
    ↳ 3 from After 2025
    ↳ 2 from 2020 - 2024
    ↳ 37 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 – Venusia cambrica

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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.

Visit NBN Site


Monthly Records By Year: Venusia cambrica
( data includes both Larvae and Adult Stages )

Monthly Counts By Year: Venusia cambrica
( data is based on 'Adult' stage records only. )


First/Last Recorded Dates: Venusia cambrica
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: Venusia cambrica
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Venusia cambrica
AGR: 4.17%   |   Total % Change: 166.7%


CUSUM Analysis: Venusia cambrica
About this chart: CUSUM (Cumulative Sum) charts track long-term trends in moth populations [ filtered by 'Adult' and 'Mine' life stages ] by showing whether each year’s counts are above or below the historical average. Even small shifts build up over time, making trends of growth, stability, or decline easier to see. CUSUM highlights trend-consistency — asking: “Across the years, have moth counts mostly stayed above or below average?”
The data sample has 14 gap year/s here (zero records) between 2000 and 2025. The moth may have been present in those gap years, but no data was available. Too many year-gaps may exaggerate or skew the chart.

Counts for the current year (2025) are pro-rated based on data available up to month 9 (September) to provide a full-year equivalent.

Purple line rises = years better than average; falls = years worse than average.
Peak (best year) Trough (worst year) Growth periods Decline periods
Population peaked around 2006, reaching above average levels. The lowest population point occurred near 2004, showing a significant decline.

What the Y-axis "Cumulative Deviation" means: Cumulative Deviation shows the running total of how each year’s moth population count differs from the long-term average. i

Hectad (10kmx10km) Coverage: Venusia cambrica
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Venusia cambrica
( 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 - Venusia cambrica – 42 records available

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

Site NameTetradDateCountStageSource
upper cromford gardenSK25Y29/07/20251adultvc57_irecords_extract
Cromford MoorSK25X13/07/20256adultvc57_irecords_extract
upper cromford gardenSK25Y11/07/20251adultvc57_irecords_extract
Longdendale, Wildboar CloughSK09U07/07/20231adultvc57_irecords_extract
Clarkes Plantation, Two Dales, MatlockSK26W23/07/20215adultDanes_2019-2021
Yew Tree FarmSK36H22/07/20181adultvc57_irecords_extract
Bilberry Wood, AmbergateSK35L02/08/20121Adultvc57_danes_bc_data
Flash Lane,Beeley MoorSK26X27/06/20111Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R16/08/20091Adultvc57_danes_bc_data
The Mays,Malthouse Lane,FroggattSK27N28/06/20091Adultvc57_danes_bc_data
The Mays,Malthouse Lane,FroggattSK27N28/06/20091Adultvc57_danes_bc_data
Flash Lane,Beeley MoorSK26X26/06/20096Adultvc57_danes_bc_data
Flash Lane,Beeley MoorSK26X16/07/200611Adultvc57_danes_bc_data
Alport Dale, nr Ladybower ResrSK18P18/07/20052Adultvc57_danes_bc_data
Seventy Acre Woods/Flash Lane, DerbyshireSK26Y23/06/20059adultvc57_irecords_extract
Beeley (Seventy Acre Wood)SK26Y23/06/20059Adultvc57_danes_bc_data
Blackrocks,CromfordSK25X31/07/20041Adultvc57_danes_bc_data
Halldale Wood,nr Darley DaleSK26X17/06/20041Adultvc57_danes_bc_data
Blacka Moor, Dore, SheffieldSK28V06/06/20031Adultvc57_danes_bc_data
Blacka Moor, Dore, SheffieldSK28V06/06/20031Adultvc57_danes_bc_data
Ravenstor YHASK17L23/06/20011Adultvc57_danes_bc_data
Flash Lane,Beeley Moor (site not precise)SK26X14/07/199914Adultvc57_danes_bc_data
Flash Lane,Beeley Moor (site not precise)SK26X09/07/19991Adultvc57_danes_bc_data
Broadhurstedge Plantation, New MillsSJ98Y27/07/19901Adultvc57_danes_bc_data
Broadhurstedge Plantation, New MillsSJ98Y27/07/19901Adultvc57_danes_bc_data
Foxholes Lane, Tansley (site not precise)SK36F22/07/19891Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A24/07/19821Adultvc57_danes_bc_data
Matlock Moor, Cuckoostone (near golf course)SK36B06/07/19821Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A13/08/19811Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A10/08/19801Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A30/07/19801Adultvc57_danes_bc_data
Matlock Moor, Cuckoostone (site not precise)SK36B13/07/198020Adultvc57_danes_bc_data
Flash Lane,Beeley MoorSK26X26/07/19751Adultvc57_danes_bc_data
Goyt Valley, Buxton (site not precise)SK07C15/07/19622Adultvc57_danes_bc_data
Goyt Valley, Buxton (site not precise)SK07C13/07/19612Adultvc57_danes_bc_data
Goyt Valley, Buxton (site not precise)SK07C11/07/19612Adultvc57_danes_bc_data
Holy Moor, Holymoorside (site not precise)SK36J08/07/19231Adultvc57_danes_bc_data
Holy Moor, Holymoorside (site not precise)SK36J01/07/19221Adultvc57_danes_bc_data
Chesterfield (site not precise)SK37G04/08/19091Adultvc57_danes_bc_data
Goyt's Moss, Buxton (site not precise)SK07C01/01/19031Adultvc57_danes_bc_data
Lathkill Dale (site not precise)SK16S01/01/19021Adultvc57_danes_bc_data
Grindleford, FroggattSK27N01/01/19001Adultvc57_danes_bc_data

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