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 21 July 2025 by WS ***
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
IMAGES BELOW:  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

no images were found

Distribution Map for Theria primaria

Found 159 records
    ↳ 1 from After 2025
    ↳ 7 from 2020 - 2024
    ↳ 151 from Before 2020

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.

******* Choose ONLY one at a time, of either Monad, Tetrad or Hectad Distribution - each has it's own set of data. Also, the distribution maps cover ALL recorded data. *******

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.

Land-cover * shows the variety of land-cover within the VC57 area, based on the CORINE (Coordination of Information on the Environment) forty-four thematic classes of land-cover. This will show, to a greater or lesser degree, the number and variety of moths found in different land-cover types. The UK continues to operate within the Copernicus programme, with the UK Centre for Ecology & Hydrology (UKCEH) providing Corine Land Cover (CLC) datasets for the UK and its territories.


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 9 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 7 (July) 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 – 159 records available

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

TaxonSite NameTetradYearDateCountStageSource
Theria primariaBelperSK34N202520/02/20251adultvc57_irecords_extract
Theria primariaBelperSK34U202401/02/20241adultvc57_irecords_extract
Theria primariaCalke, DerbyshireSK32L202404/02/20241adultvc57_irecords_extract
Theria primariaLower Cromford GardenSK25Y202428/01/20241adultvc57_irecords_extract
Theria primariaHathersage, Derbyshire, UKSK28F202303/02/20231adultvc57_irecords_extract
Theria primariaNewton, Alfreton DE, UKSK45J202307/02/20231Adultvc57_irecords_extract
Theria primariaHathersage, Derbyshire, UKSK28F202315/01/20231adultvc57_irecords_extract
Theria primariaHathersage, Derbyshire, UKSK28F202122/01/20211adultvc57_irecords_extract
Theria primariaWoodhead Lane - LittlemoorSK36R201623/02/20161adultvc57_irecords_extract
Theria primariaBackgarden MarehaySK34Z201221/02/20121adultvc57_irecords_extract
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201226/02/20121Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201226/02/20121Adultvc57_danes_bc_data
Theria primariaShipley Briefing Centre, Shipley CP, IlkestonSK44H201210/01/201212Adultvc57_danes_bc_data
Theria primariaBack Lane,GlapwellSK46T201216/01/20121Adultvc57_danes_bc_data
Theria primariaBack Lane, GlapwellSK46T201216/01/20121Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201107/02/20111Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201108/02/20111Adultvc57_danes_bc_data
Theria primariaShipley Park (visitor centre), IlkestonSK44H201108/02/20112Adultvc57_danes_bc_data
Theria primariaShipley Park,IlkestonSK44H201108/02/20111Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201109/02/20113Adultvc57_danes_bc_data
Theria primariaOver Haddon,BakewellSK26D201110/02/20116Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201110/02/20113Adultvc57_danes_bc_data
Theria primariaOver Haddon,BakewellSK26D201116/02/20111Adultvc57_danes_bc_data
Theria primariaHardhurst Rd, Alvaston, DerbySK33W201106/02/20111Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201113/01/20111Adultvc57_danes_bc_data
Theria primariaClough Wood,Darley DaleSK26K201114/01/20112Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201116/01/20111Adultvc57_danes_bc_data
Theria primariaOver Haddon,BakewellSK26D201117/01/20116Adultvc57_danes_bc_data
Theria primariaOver Haddon,BakewellSK26D201118/01/20113Adultvc57_danes_bc_data
Theria primariaCrow Hill, Ashford in the WaterSK26E201119/01/20111Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201122/01/20111Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201123/01/20111Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201124/01/20111Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201125/01/20111Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201126/01/20111Adultvc57_danes_bc_data
Theria primariaThe Hollies,Holly St,Stapenhill,Burton on TrentSK22K201101/01/20111Adultvc57_danes_bc_data
Theria primariaShipley Park (visitor centre), IlkestonSK44H201111/01/20112Adultvc57_danes_bc_data
Theria primariaHaddon Grove, BakewellSK16Y201112/01/20116Adultvc57_danes_bc_data
Theria primariaOver Haddon (lanes), BakewellSK26D201112/01/20116Adultvc57_danes_bc_data
Theria primariaSchool Close,Parkway Gardens,Darley DaleSK26R201112/01/20111Adultvc57_danes_bc_data
Theria primariaOver Haddon (lanes), BakewellSK26D201113/01/20116Adultvc57_danes_bc_data
Theria primariaHardhurst Rd, Alvaston, DerbySK33W201113/01/20111Adultvc57_danes_bc_data
Theria primariaWilmot St,Long EatonSK43R201010/04/20101Adultvc57_danes_bc_data
Theria primariaWilmot St,Long EatonSK43R201020/02/20101Adultvc57_danes_bc_data
Theria primariaCarvers Rocks, Hartshorne, SwadlincoteSK32G201018/01/20101Adultvc57_danes_bc_data
Theria primariaOver Haddon (Back Lane), BakewellSK26D201024/01/20101Adultvc57_danes_bc_data
Theria primariaGilbert St,Walton,ChesterfieldSK36U200920/03/20091Adultvc57_danes_bc_data
Theria primariaAult Hucknall,GlapwellSK46S200910/02/20091Adultvc57_danes_bc_data
Theria primariaBramley Farm,Bubnell,BaslowSK27L200920/02/20091Adultvc57_danes_bc_data
Theria primariaUnthank,HolmesfieldSK37C200928/01/20091Adultvc57_danes_bc_data
Theria primariaOver Haddon (Burton Manor Farm), BakewellSK26D200822/03/20081Adultvc57_danes_bc_data
Theria primariaLancaster Ave,SandiacreSK43S200704/12/20071Adultvc57_danes_bc_data
Theria primariaStainsby Park,GlapwellSK46S200701/02/20071Adultvc57_danes_bc_data
Theria primariaStainsby Park,GlapwellSK46S200702/02/20072Adultvc57_danes_bc_data
Theria primariaStainsby Park,GlapwellSK46S200722/01/20072Adultvc57_danes_bc_data
Theria primariaStainsby Park,GlapwellSK46S200723/01/200710Adultvc57_danes_bc_data
Theria primariaStainsby Park,GlapwellSK46S200729/01/20072Adultvc57_danes_bc_data
Theria primariaAult Hucknall,GlapwellSK46S200729/01/20072Adultvc57_danes_bc_data
Theria primariaStainsby Park,GlapwellSK46S200730/01/20071Adultvc57_danes_bc_data
Theria primariaAult Hucknall,GlapwellSK46S200605/02/20061Adultvc57_danes_bc_data
Theria primariaCross Green Cottages,Flint Lane,South DarleySK26Q200629/01/20061Adultvc57_danes_bc_data
Theria primariaAult Hucknall,GlapwellSK46S200501/02/20051Adultvc57_danes_bc_data
Theria primariaShipley Park Visitor Centre,Shipley,IlkestonSK44H200513/01/20051Adultvc57_danes_bc_data
Theria primariaAult Hucknall,GlapwellSK46S200528/01/20051Adultvc57_danes_bc_data
Theria primariaFord Lane,Allestree,DerbySK34K200410/04/20041Adultvc57_danes_bc_data
Theria primariaFord Lane, Allestree, DerbySK34K200410/04/20041Adultvc57_danes_bc_data
Theria primariaClough Wood/Darley BridgeSK26Q200416/03/20042Adultvc57_danes_bc_data
Theria primariaClough Wood/Darley BridgeSK26Q200416/03/20042Adultvc57_danes_bc_data
Theria primariaFord Lane,Allestree,DerbySK34K200323/01/20031Adultvc57_danes_bc_data
Theria primariaFord Lane, Allestree, DerbySK34K200323/01/20031Adultvc57_danes_bc_data
Theria primariaShipley Park Visitor Centre,IlkestonSK44H200215/01/20021Adultvc57_danes_bc_data
Theria primariaShipley Park Visitor Centre,IlkestonSK44H200215/01/20021Adultvc57_danes_bc_data
Theria primariaLings Close,IlkestonSK44S200128/01/20011Adultvc57_danes_bc_data
Theria primariaLings Close,IlkestonSK44S199903/04/19992Adultvc57_danes_bc_data
Theria primariaShipley Park Visitor Centre,IlkestonSK44H199905/01/19992Adultvc57_danes_bc_data
Theria primariaFord Lane,Allestree,DerbySK34K199920/01/19991Adultvc57_danes_bc_data
Theria primariaLings Close,IlkestonSK44S199924/01/19991Adultvc57_danes_bc_data
Theria primariaFord Lane, Allestree, DerbySK34K199920/01/19991Adultvc57_danes_bc_data
Theria primariaTicknall Limeyards,TicknallSK32R199811/02/19982Adultvc57_danes_bc_data
Theria primariaShipley Park Visitor Centre,IlkestonSK44H199704/02/199712Adultvc57_danes_bc_data
Theria primariaShipley Park Visitor Centre,IlkestonSK44H199507/02/19952Adultvc57_danes_bc_data
Theria primariaShipley Park Visitor Centre,IlkestonSK44H199507/02/19952Adultvc57_danes_bc_data
Theria primariaShipley Park Visitor Centre,IlkestonSK44H199302/02/19933Adultvc57_danes_bc_data
Theria primariaWoodlands, Combs, Chapel en le FrithSK07P199317/02/19931Adultvc57_danes_bc_data
Theria primariaShipley Park Visitor Centre,IlkestonSK44H199302/02/19933Adultvc57_danes_bc_data
Theria primariaElvaston Park (Hall), DerbySK43B198902/02/19891Adultvc57_danes_bc_data
Theria primariaJohnnygate, Barlow, ChesterfieldSK37C198820/02/19881Adultvc57_danes_bc_data
Theria primariaJohnnygate, Barlow, ChesterfieldSK37C198820/02/19881Adultvc57_danes_bc_data
Theria primariaElvaston Park (Hall), DerbySK43B198809/01/19881Adultvc57_danes_bc_data
Theria primariaElvaston Park (Hall), DerbySK43B198815/01/19881Adultvc57_danes_bc_data
Theria primariaJohnnygate, Barlow, ChesterfieldSK37C198816/01/19881Adultvc57_danes_bc_data
Theria primariaElvaston Park (Hall), DerbySK43B198818/01/19881Adultvc57_danes_bc_data
Theria primariaJohnnygate, Barlow, ChesterfieldSK37C198823/01/19881Adultvc57_danes_bc_data
Theria primariaJohnnygate, Barlow, ChesterfieldSK37C198830/01/19881Adultvc57_danes_bc_data
Theria primariaJohnnygate, Barlow, ChesterfieldSK37C198816/01/19881Adultvc57_danes_bc_data
Theria primariaJohnnygate, Barlow, ChesterfieldSK37C198823/01/19881Adultvc57_danes_bc_data
Theria primariaJohnnygate, Barlow, ChesterfieldSK37C198830/01/19881Adultvc57_danes_bc_data
Theria primariaElvaston Park (Hall), DerbySK43B198701/03/19871Adultvc57_danes_bc_data
Theria primariaElvaston Park (Hall), DerbySK43B198728/02/19871Adultvc57_danes_bc_data
Theria primariaElvaston Park (Hall), DerbySK43B198724/01/19871Adultvc57_danes_bc_data
Theria primariaElvaston Park (Hall), DerbySK43B198725/01/19871Adultvc57_danes_bc_data
Theria primariaElvaston Park (Hall), DerbySK43B198726/01/19873Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198502/03/19851Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198502/03/19851Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198502/02/19851Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198504/02/19851Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198526/02/19851Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198527/02/19851Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198502/02/19851Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198504/02/19851Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198526/02/19851Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198527/02/19851Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198401/03/19842Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198401/03/19842Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198410/02/19841Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198411/02/19841Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198410/02/19841Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198411/02/19841Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198204/02/19821Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198204/02/19821Adultvc57_danes_bc_data
Theria primariaLings Close,IlkestonSK44S198116/03/19811Adultvc57_danes_bc_data
Theria primariaCarvers Rocks NR, Hartshorne, Swadlincote (site not precise)SK32G198107/02/198116Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198112/02/19811Adultvc57_danes_bc_data
Theria primariaShipley Wood, Shipley Park, IlkestonSK44L198128/02/19812Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198112/02/19811Adultvc57_danes_bc_data
Theria primariaShipley Wood, Shipley Park, IlkestonSK44L198128/02/19812Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198004/02/19801Adultvc57_danes_bc_data
Theria primariaAskew Grove, ReptonSK32D198011/02/19801Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198013/02/19801Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198015/02/19801Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198013/02/19801Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198015/02/19801Adultvc57_danes_bc_data
Theria primariaShardlow Hall, Shardlow, Long EatonSK43F198004/02/19801Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197826/02/19781Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197702/03/19771Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197709/02/19771Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197710/02/19772Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197714/02/19771Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197715/02/19771Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197723/01/19772Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197625/02/19762Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197503/01/19751Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197510/01/19751Adultvc57_danes_bc_data
Theria primariaField Close, Hilton, Burton on TrentSK23K197525/01/19752Adultvc57_danes_bc_data
Theria primariaBarlow, DronfieldSK37M197213/02/19721Adultvc57_danes_bc_data
Theria primariaBroomridding Wood, Pilsley, Tibshelf (site not precise)SK46H197105/02/19717Adultvc57_danes_bc_data
Theria primarianr Palterton, Bolsover (site not precise)SK46U197111/02/19713Adultvc57_danes_bc_data
Theria primariaHolymoorside (site not precise)SK36N196602/02/19661Adultvc57_danes_bc_data
Theria primariaNewbold Back Lane, Chesterfield (site not precise)SK37R196506/02/19651Adultvc57_danes_bc_data
Theria primariaNewbold Rd, ChesterfieldSK37R196319/04/19631Adultvc57_danes_bc_data
Theria primariaNewbold Rd, ChesterfieldSK37R196319/03/19631Adultvc57_danes_bc_data
Theria primariaNewbold Rd, ChesterfieldSK37R196331/03/19631Adultvc57_danes_bc_data
Theria primariaMoorend, Beeley, MatlockSK26T196028/02/19601Adultvc57_danes_bc_data
Theria primariaMoorend, BeeleySK26T196028/02/19601Adultvc57_danes_bc_data
Theria primariaBeeley, MatlockSK26T195902/04/19591Adultvc57_danes_bc_data
Theria primariaBeeleySK26T195902/04/19591Adultvc57_danes_bc_data
Theria primariaBeeley, MatlockSK26T195901/03/19597Adultvc57_danes_bc_data
Theria primariaBeeleySK26T195901/03/19597Adultvc57_danes_bc_data
Theria primariaNewbold Ave, ChesterfieldSK37R195224/03/19521Adultvc57_danes_bc_data

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