Clouded Silver       Light Emerald
70.282 BF1960  –  Geometridae –  Larentiinae – Theria primaria – Early Moth – (Haworth, 1809) 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.
ID pointers: Females are wingless. A variable brownish moth with a contrasting darker brown cross band, edged pale, through the forewing, with a central dark kidney mark. Hind wing is very pale cream colour with a neat chequered band along the trailing edge.
Distribution:  (Last record: 2024 )  –  A resident species that appears to have become rather scarce and localised in the county, with very few records. Once common and widely distributed in Derbyshire. A species that may be suffering.
Flight Period: January /  February /  March /  –  January – March – one generation – flies at dusk Moth Activity: Nocturnal   – and is attracted to light Photographed: Yes –  Photographed By: Clive Ashton; Dave Evans  © All Rights Reserved
*** Last updated on 2 October 2025 by RP ***
Wingspan: 32-37mm
Forewing: 14-17mm Food Plant: Hawthorn (Crataegus) and Blackthorn (Prunus spinosa)
Last Recorded Year: 2024
Last Recorded By – Not Recorded
Last Recorded General Area – Not Recorded
Selected Images:  Cromford, Derbyshire – Clive Ashton © / Belper (2025) Dave Evans©

70.282 BF1960 - Early Moth - Geometridae - Theria primaria - Clive Ashton
Early Moth – Theria primaria – Clive Ashton
Early Moth - 20th February 2025 - Belper Dave Evans
Early Moth – 20th February 2025 – Belper Dave Evans
70.282 BF1960 - Early Moth - Geometridae - Theria primaria - Clive Ashton
Early Moth - 20th February 2025 - Belper Dave Evans


Image Gallery

No gallery images found for this moth.


Distribution Map for Theria primaria

Found 161 records
    ↳ 1 from After 2025
    ↳ 7 from 2020 - 2024
    ↳ 153 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 – Theria primaria

⚠️ 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: Theria primaria
( data includes both Larvae and Adult Stages )

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


First/Last Recorded Dates: Theria primaria
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: Theria primaria
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Theria primaria
AGR: 0%   |   Total % Change: 0%


CUSUM Analysis: Theria primaria
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 8 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 8 (August) 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 2012, reaching above average levels. The lowest population point occurred near 2006, 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: Theria primaria
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Theria primaria
( 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 - Theria primaria – 161 records available

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

Site NameTetradDateCountStageSource
BelperSK34N20/02/20251adultvc57_irecords_extract
BelperSK34U01/02/20241adultvc57_irecords_extract
Calke, DerbyshireSK32L04/02/20241adultvc57_irecords_extract
Lower Cromford GardenSK25Y28/01/20241adultvc57_irecords_extract
Hathersage, Derbyshire, UKSK28F03/02/20231adultvc57_irecords_extract
Newton, Alfreton DE, UKSK45J07/02/20231Adultvc57_irecords_extract
Hathersage, Derbyshire, UKSK28F15/01/20231adultvc57_irecords_extract
Hathersage, Derbyshire, UKSK28F22/01/20211adultvc57_irecords_extract
DRONFIELD WOODHOUSESK37J01/04/20171adultvc57_irecords_extract
Woodhead Lane - LittlemoorSK36R23/02/20161adultvc57_irecords_extract
Backgarden MarehaySK34Z21/02/20121adultvc57_irecords_extract
School Close,Parkway Gardens,Darley DaleSK26R26/02/20121Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R26/02/20121Adultvc57_danes_bc_data
Shipley Briefing Centre, Shipley CP, IlkestonSK44H10/01/201212Adultvc57_danes_bc_data
Back Lane,GlapwellSK46T16/01/20121Adultvc57_danes_bc_data
Back Lane, GlapwellSK46T16/01/20121Adultvc57_danes_bc_data
Dronfield WoodhouseSK37J27/02/20111adultvc57_irecords_extract
School Close,Parkway Gardens,Darley DaleSK26R07/02/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R08/02/20111Adultvc57_danes_bc_data
Shipley Park (visitor centre), IlkestonSK44H08/02/20112Adultvc57_danes_bc_data
Shipley Park,IlkestonSK44H08/02/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R09/02/20113Adultvc57_danes_bc_data
Over Haddon,BakewellSK26D10/02/20116Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R10/02/20113Adultvc57_danes_bc_data
Over Haddon,BakewellSK26D16/02/20111Adultvc57_danes_bc_data
Hardhurst Rd, Alvaston, DerbySK33W06/02/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R13/01/20111Adultvc57_danes_bc_data
Clough Wood,Darley DaleSK26K14/01/20112Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R16/01/20111Adultvc57_danes_bc_data
Over Haddon,BakewellSK26D17/01/20116Adultvc57_danes_bc_data
Over Haddon,BakewellSK26D18/01/20113Adultvc57_danes_bc_data
Crow Hill, Ashford in the WaterSK26E19/01/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R22/01/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R23/01/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R24/01/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R25/01/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R26/01/20111Adultvc57_danes_bc_data
The Hollies,Holly St,Stapenhill,Burton on TrentSK22K01/01/20111Adultvc57_danes_bc_data
Shipley Park (visitor centre), IlkestonSK44H11/01/20112Adultvc57_danes_bc_data
Haddon Grove, BakewellSK16Y12/01/20116Adultvc57_danes_bc_data
Over Haddon (lanes), BakewellSK26D12/01/20116Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R12/01/20111Adultvc57_danes_bc_data
Over Haddon (lanes), BakewellSK26D13/01/20116Adultvc57_danes_bc_data
Hardhurst Rd, Alvaston, DerbySK33W13/01/20111Adultvc57_danes_bc_data
Wilmot St,Long EatonSK43R10/04/20101Adultvc57_danes_bc_data
Wilmot St,Long EatonSK43R20/02/20101Adultvc57_danes_bc_data
Carvers Rocks, Hartshorne, SwadlincoteSK32G18/01/20101Adultvc57_danes_bc_data
Over Haddon (Back Lane), BakewellSK26D24/01/20101Adultvc57_danes_bc_data
Gilbert St,Walton,ChesterfieldSK36U20/03/20091Adultvc57_danes_bc_data
Ault Hucknall,GlapwellSK46S10/02/20091Adultvc57_danes_bc_data
Bramley Farm,Bubnell,BaslowSK27L20/02/20091Adultvc57_danes_bc_data
Unthank,HolmesfieldSK37C28/01/20091Adultvc57_danes_bc_data
Over Haddon (Burton Manor Farm), BakewellSK26D22/03/20081Adultvc57_danes_bc_data
Lancaster Ave,SandiacreSK43S04/12/20071Adultvc57_danes_bc_data
Stainsby Park,GlapwellSK46S01/02/20071Adultvc57_danes_bc_data
Stainsby Park,GlapwellSK46S02/02/20072Adultvc57_danes_bc_data
Stainsby Park,GlapwellSK46S22/01/20072Adultvc57_danes_bc_data
Stainsby Park,GlapwellSK46S23/01/200710Adultvc57_danes_bc_data
Stainsby Park,GlapwellSK46S29/01/20072Adultvc57_danes_bc_data
Ault Hucknall,GlapwellSK46S29/01/20072Adultvc57_danes_bc_data
Stainsby Park,GlapwellSK46S30/01/20071Adultvc57_danes_bc_data
Ault Hucknall,GlapwellSK46S05/02/20061Adultvc57_danes_bc_data
Cross Green Cottages,Flint Lane,South DarleySK26Q29/01/20061Adultvc57_danes_bc_data
Ault Hucknall,GlapwellSK46S01/02/20051Adultvc57_danes_bc_data
Shipley Park Visitor Centre,Shipley,IlkestonSK44H13/01/20051Adultvc57_danes_bc_data
Ault Hucknall,GlapwellSK46S28/01/20051Adultvc57_danes_bc_data
Ford Lane,Allestree,DerbySK34K10/04/20041Adultvc57_danes_bc_data
Ford Lane, Allestree, DerbySK34K10/04/20041Adultvc57_danes_bc_data
Clough Wood/Darley BridgeSK26Q16/03/20042Adultvc57_danes_bc_data
Clough Wood/Darley BridgeSK26Q16/03/20042Adultvc57_danes_bc_data
Ford Lane,Allestree,DerbySK34K23/01/20031Adultvc57_danes_bc_data
Ford Lane, Allestree, DerbySK34K23/01/20031Adultvc57_danes_bc_data
Shipley Park Visitor Centre,IlkestonSK44H15/01/20021Adultvc57_danes_bc_data
Shipley Park Visitor Centre,IlkestonSK44H15/01/20021Adultvc57_danes_bc_data
Lings Close,IlkestonSK44S28/01/20011Adultvc57_danes_bc_data
Lings Close,IlkestonSK44S03/04/19992Adultvc57_danes_bc_data
Shipley Park Visitor Centre,IlkestonSK44H05/01/19992Adultvc57_danes_bc_data
Ford Lane,Allestree,DerbySK34K20/01/19991Adultvc57_danes_bc_data
Lings Close,IlkestonSK44S24/01/19991Adultvc57_danes_bc_data
Ford Lane, Allestree, DerbySK34K20/01/19991Adultvc57_danes_bc_data
Ticknall Limeyards,TicknallSK32R11/02/19982Adultvc57_danes_bc_data
Shipley Park Visitor Centre,IlkestonSK44H04/02/199712Adultvc57_danes_bc_data
Shipley Park Visitor Centre,IlkestonSK44H07/02/19952Adultvc57_danes_bc_data
Shipley Park Visitor Centre,IlkestonSK44H07/02/19952Adultvc57_danes_bc_data
Shipley Park Visitor Centre,IlkestonSK44H02/02/19933Adultvc57_danes_bc_data
Woodlands, Combs, Chapel en le FrithSK07P17/02/19931Adultvc57_danes_bc_data
Shipley Park Visitor Centre,IlkestonSK44H02/02/19933Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B02/02/19891Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C20/02/19881Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C20/02/19881Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B09/01/19881Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B15/01/19881Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C16/01/19881Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B18/01/19881Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C23/01/19881Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C30/01/19881Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C16/01/19881Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C23/01/19881Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C30/01/19881Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B01/03/19871Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B28/02/19871Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B24/01/19871Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B25/01/19871Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B26/01/19873Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F02/03/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F02/03/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F02/02/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F04/02/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F26/02/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F27/02/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F02/02/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F04/02/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F26/02/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F27/02/19851Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F01/03/19842Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F01/03/19842Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F10/02/19841Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F11/02/19841Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F10/02/19841Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F11/02/19841Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F04/02/19821Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F04/02/19821Adultvc57_danes_bc_data
Lings Close,IlkestonSK44S16/03/19811Adultvc57_danes_bc_data
Carvers Rocks NR, Hartshorne, Swadlincote (site not precise)SK32G07/02/198116Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F12/02/19811Adultvc57_danes_bc_data
Shipley Wood, Shipley Park, IlkestonSK44L28/02/19812Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F12/02/19811Adultvc57_danes_bc_data
Shipley Wood, Shipley Park, IlkestonSK44L28/02/19812Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F04/02/19801Adultvc57_danes_bc_data
Askew Grove, ReptonSK32D11/02/19801Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F13/02/19801Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F15/02/19801Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F13/02/19801Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F15/02/19801Adultvc57_danes_bc_data
Shardlow Hall, Shardlow, Long EatonSK43F04/02/19801Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K26/02/19781Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K02/03/19771Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K09/02/19771Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K10/02/19772Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K14/02/19771Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K15/02/19771Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K23/01/19772Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K25/02/19762Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K03/01/19751Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K10/01/19751Adultvc57_danes_bc_data
Field Close, Hilton, Burton on TrentSK23K25/01/19752Adultvc57_danes_bc_data
Barlow, DronfieldSK37M13/02/19721Adultvc57_danes_bc_data
Broomridding Wood, Pilsley, Tibshelf (site not precise)SK46H05/02/19717Adultvc57_danes_bc_data
nr Palterton, Bolsover (site not precise)SK46U11/02/19713Adultvc57_danes_bc_data
Holymoorside (site not precise)SK36N02/02/19661Adultvc57_danes_bc_data
Newbold Back Lane, Chesterfield (site not precise)SK37R06/02/19651Adultvc57_danes_bc_data
Newbold Rd, ChesterfieldSK37R19/04/19631Adultvc57_danes_bc_data
Newbold Rd, ChesterfieldSK37R19/03/19631Adultvc57_danes_bc_data
Newbold Rd, ChesterfieldSK37R31/03/19631Adultvc57_danes_bc_data
Moorend, Beeley, MatlockSK26T28/02/19601Adultvc57_danes_bc_data
Moorend, BeeleySK26T28/02/19601Adultvc57_danes_bc_data
Beeley, MatlockSK26T02/04/19591Adultvc57_danes_bc_data
BeeleySK26T02/04/19591Adultvc57_danes_bc_data
Beeley, MatlockSK26T01/03/19597Adultvc57_danes_bc_data
BeeleySK26T01/03/19597Adultvc57_danes_bc_data
Newbold Ave, ChesterfieldSK37R24/03/19521Adultvc57_danes_bc_data

Clouded Silver       Light Emerald

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