Frosted Green       December Moth
65.016 BF1659  – Yellow-horned – Achlya flavicornis – (Linnaeus, 1758) Adult Macro:  CAT 1 – Distinctive species unlikely to be confused with others –       PDF Icon – click for Adult Macro Verification Guidelines
Blue –  Generally Common / Widespread   
Taxonomy:   Macro  >>.  >>  Drepanidae  >> Thyatirinae
ID Difficulty:  green  – easy to identify, generally distinctive and unlikely to be confused with other species.
ID pointers: The moth gets its name from the yellowish orange colour of the antennae. The wing colour is and intricate combination of browns & buffs with darker cross lines and paler buff patches in the central outer-edge of the wing and towards the wing base. An attractive spring moth.
Distribution:  Widely distributed in Derbyshire and locally common. Found wherever there is birch, the larval food plant. Highest densities are in the lowland areas south of the River Trent.
General Comment: None Flight Period: February /  April –  On the wing – late February – April.One generation Photographed: Yes –  Photographed By: Tony Davison; Dave Evans  © All Rights Reserved
*** Last updated on 2 October 2025 by RP ***
Specific Recorded History Dates for Common [Blue code Blue-coded] moths is not displayed/updated in this tab. However, all verified records for this moth are listed in the RECORDS tab below.
Selected Images:  Foremark Reservoir, Derbyshire and Melbourne (2025) Tony Davison© / Belper (2025) Dave Evans©

65.016 BF1659 - Yellow Horned - Drepanidae - Achlya flavicornis
Yellow Horned – Achlya flavicornis
65.016 BF1659 - Yellow Horned - Drepanidae - Achlya flavicornis
Yellow Horned – Achlya flavicornis
Yellow Horned - 6th March 2025 - Melbourne- Tony Davison©
Yellow Horned – 6th March 2025 – Melbourne- Tony Davison©
Yellow Horned - 6th March 2025 - Melbourne- Tony Davison©
Yellow Horned – 6th March 2025 – Melbourne- Tony Davison©
Yellow Horned - 5th March 2025 - Belper - Dave Evans
Yellow Horned – 5th March 2025 – Belper – Dave Evans
65.016 BF1659 - Yellow Horned - Drepanidae - Achlya flavicornis
65.016 BF1659 - Yellow Horned - Drepanidae - Achlya flavicornis
Yellow Horned - 6th March 2025 - Melbourne- Tony Davison©
Yellow Horned - 6th March 2025 - Melbourne- Tony Davison©
Yellow Horned - 5th March 2025 - Belper - Dave Evans


Image Gallery

Yellow Horned - 6th March 2025 - Melbourne- Tony Davison© Yellow Horned - 6th March 2025 - Melbourne- Tony Davison© Yellow Horned - Foremark Reservoir - Tony Davison© Yellow Horned - Foremark Reservoir - Tony Davison©

 

Distribution Map for Achlya flavicornis

Found 190 records
    ↳ from 2026+
    ↳ 34 from 2020 - 2025
    ↳ 156 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 – Achlya flavicornis

⚠️ 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: Achlya flavicornis
( data includes both Larvae and Adult Stages )

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


First/Last Recorded Dates: Achlya flavicornis
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: Achlya flavicornis
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Achlya flavicornis
AGR: 0.64%   |   Total % Change: 16.7%

Hectad (10kmx10km) Coverage: Achlya flavicornis
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Achlya flavicornis

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 - Achlya flavicornis – 190 records available

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

Site NameTetradDateCountStageSource
Longdendale, Wildboar Clough WoodlandSK09U01/04/20254adultvc57_irecords_extract
Markham Vale South Tip PerimeterSK47K27/03/20252adultvc57_irecords_extract
Derbyshire Wild Life Trust Long Clough, Herod CloughSK09G24/03/20252adultvc57_irecords_extract
Markham Vale DerbyshireSK47L20/03/202511adultvc57_irecords_extract
SYA gardenSK47H19/03/20251adultvc57_irecords_extract
SYA gardenSK47H19/03/20251adultvc57_irecords_extract
Glossop, Gnat Hole Rough FieldsSK09L08/03/20252adultvc57_irecords_extract
Staveley DerbyshireSK47H07/03/20251adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G07/03/20251adultvc57_irecords_extract
Glossop, Gnat Hole Rough FieldsSK09L07/03/20251adultvc57_irecords_extract
Melbourne, DerbyshireSK32X06/03/20251adultvc57_irecords_extract
BelperSK34N05/03/20251adultvc57_irecords_extract
Inkersall gardenSK47G18/03/20241adultvc57_irecords_extract
Markham Vale DerbyshireSK47L18/03/20242adultvc57_irecords_extract
Glossop, Gnat Hole Rough FieldsSK09L12/03/20241adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G09/03/20246adultvc57_irecords_extract
Peak District National Park, Glossop, England, GBSK09U08/03/20241Adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G07/03/20248adultvc57_irecords_extract
BelperSK34N06/03/20241adultvc57_irecords_extract
Markham Vale South TipSK47K06/03/202420adultvc57_irecords_extract
Longdendale, Wildboar CloughSK09U06/03/20246adultvc57_irecords_extract
Markham Vale DerbyshireSK47K06/03/202420adultvc57_irecords_extract
Matlock DE, UKSK36A05/03/20241Adultvc57_irecords_extract
Lower Cromford GardenSK25Y29/02/20241exuviavc57_irecords_extract
Markham Vale South TipSK47L19/02/20248adultvc57_irecords_extract
Markham Vale DerbyshireSK47L19/02/20248adultvc57_irecords_extract
Derbyshire Wild Life Trust Long CloughSK09G21/03/20231adultvc57_irecords_extract
Hathersage, Derbyshire, UKSK28F17/03/20232adultvc57_irecords_extract
Glossop, Gnat Hole Rough FieldsSK09L17/03/20231adultvc57_irecords_extract
Glossop, Hague Street, Hay meadowSK09G16/03/20231adultvc57_irecords_extract
Hathersage, Derbyshire, UKSK28F11/03/20221adultvc57_irecords_extract
Hathersage, Derbyshire, UKSK28F25/03/20211adultvc57_irecords_extract
HathersageSK28F06/05/20201adultvc57_irecords_extract
Yew Tree FarmSK36H19/03/20201adultvc57_irecords_extract
Pleasley Pit CP, PleasleySK46X18/05/20191adultDanes_2019-2021
Pleasley Pit CP, PleasleySK46X24/03/20191adultDanes_2019-2021
Main Street, Kings NewtonSK32Y21/03/20191Adultvc57_irecords_extract
Findern, Derbyshire, DEAZSK33A15/03/20191adultvc57_irecords_extract
Repton Shrubs, Repton (site not precise)SK32B01/05/20156Adultvc57_danes_bc_data
Welbeck Drive,WingerworthSK36T06/04/20151Adultvc57_danes_bc_data
Hillside, The Hillock, Curbur, CalverSK27M21/03/20141Adultvc57_danes_bc_data
Hillside, The Hillock, Curbur, CalverSK27M20/03/20141Adultvc57_danes_bc_data
Hillside, The Hillock, Curbur, CalverSK27M19/03/20141Adultvc57_danes_bc_data
Hillside, The Hillock, Curbur, CalverSK27M18/03/20141Adultvc57_danes_bc_data
Hillside, The Hillock, Curbur, CalverSK27M10/03/20142Adultvc57_danes_bc_data
Mansell Park Farm (old sand quarry), MercastonSK24M21/04/20131Adultvc57_danes_bc_data
Mansell Park Farm (old sand quarry), MercastonSK24M21/04/20131Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R16/04/20132Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R16/04/20132Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R14/04/20131Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R14/04/20131Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R12/04/20131Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R12/04/20131Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R10/04/20131Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R10/04/20131Adultvc57_danes_bc_data
Newboundmill Lane,PleasleySK56C09/03/20121Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R09/03/20121Adultvc57_danes_bc_data
Buxton SK, UKSK07S24/03/20111Adultvc57_irecords_extract
Ladycroft Ave,BuxtonSK07S23/03/20111Adultvc57_danes_bc_data
Clough Wood,Darley DaleSK26K23/03/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R23/03/20111Adultvc57_danes_bc_data
Ladycroft Ave, BuxtonSK07S23/03/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R22/03/20112Adultvc57_danes_bc_data
Leash Fen,BaslowSK27X22/03/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R21/03/20113Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R21/03/20111Adultvc57_danes_bc_data
Clough Wood,Darley DaleSK26K20/03/20116Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R20/03/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R19/03/20111Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R19/03/20111Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R12/03/20111Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R11/03/20111Adultvc57_danes_bc_data
Shinningcliffe Wood,AmbergateSK35K11/03/20112Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R09/03/20111Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R26/03/20101Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R17/03/20101Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R16/03/20101Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R01/04/20091Adultvc57_danes_bc_data
Cross Green Cottages,Flint Lane,South DarleySK26Q20/03/20091Adultvc57_danes_bc_data
The Mays,Malthouse Lane,FroggattSK27N17/03/20091Adultvc57_danes_bc_data
The Mays,Malthouse Lane,FroggattSK27N17/03/20091Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R30/03/20081Adultvc57_danes_bc_data
Calke Park Estate bottom of Fishermans carparkSK32R06/03/20081adultvc57_irecords_extract
Calke Park,TicknallSK32R06/03/20081Adultvc57_danes_bc_data
Robin WoodSK32M01/04/20072Adultvc57_irecords_extract
Robin Wood (centre area track), TicknallSK32M01/04/20072Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R13/03/20071Adultvc57_danes_bc_data
Calke ParkSK32L12/03/20074adultvc57_irecords_extract
The Hollies,Station Rd,Darley DaleSK26R12/03/20072Adultvc57_danes_bc_data
Calke Park,TicknallSK32L12/03/20074Adultvc57_danes_bc_data
FOREMARK RESERVOIR DERBYSHIRESK32H10/03/200740adultvc57_irecords_extract
Carvers Rocks (old toilet block area), Hartshorne, SwadlincoteSK32G10/03/200730Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R09/03/20071Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R08/03/20071Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R31/03/20061Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R31/03/20061Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R29/03/20061Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M10/03/20061Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M10/03/20061Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M21/03/20052Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M21/03/20052Adultvc57_danes_bc_data
FOREMARK RESERVOIRSK32G29/03/20045adultvc57_irecords_extract
Carvers Rocks, Hartshorne, SwadlincoteSK32G29/03/20045Adultvc57_danes_bc_data
The Hollies,Station Rd,Darley DaleSK26R17/03/20041Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R17/03/20041Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R17/03/20041Adultvc57_danes_bc_data
FOREMARK RESERVOIRSK32H15/03/200426adultvc57_irecords_extract
School Close,Parkway Gardens,Darley DaleSK26R15/03/20042Adultvc57_danes_bc_data
Foremark Res (Boat Yard edge), TicknallSK32G15/03/20046Adultvc57_danes_bc_data
Foremark Resr (Orchid meadow edge), TicknallSK32H15/03/20043Adultvc57_danes_bc_data
Foremark Resr (Spur's Bottom wood), TicknallSK32H15/03/20042Adultvc57_danes_bc_data
Foremark Resr (Spur's Bottom wood), TicknallSK32H15/03/20046Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R15/03/20042Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R08/03/20041Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R08/03/20041Adultvc57_danes_bc_data
Carvers Rocks NR,Hartshorne,SwadlincoteSK32G15/03/20031Adultvc57_danes_bc_data
Carvers Rocks NR,Hartshorne,SwadlincoteSK32G15/03/20031Adultvc57_danes_bc_data
School Close,Parkway Gardens,Darley DaleSK26R10/03/20031Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M04/04/20021Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M02/05/20012Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M02/05/20012Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M18/03/19993Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M18/03/19993Adultvc57_danes_bc_data
Calke Park (Poker's Leys), TicknallSK32L15/03/19981Adultvc57_danes_bc_data
Calke Park (Poker's Leys), TicknallSK32L15/03/19981Adultvc57_danes_bc_data
Pokers Leys,Calke Park,TicknallSK32L20/02/199815Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M13/03/19974Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M13/03/19974Adultvc57_danes_bc_data
Calke Park,TicknallSK32R09/03/19971Adultvc57_danes_bc_data
Calke Park (Poker's Leys), TicknallSK32L27/02/19971Adultvc57_danes_bc_data
Calke Park (Poker's Leys), TicknallSK32L27/02/19971Adultvc57_danes_bc_data
Shipley Wood, Shipley Park, IlkestonSK44M09/04/19961Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M09/04/19961Adultvc57_danes_bc_data
The Field,Shipley,IlkestonSK44M09/04/19961Adultvc57_danes_bc_data
Carvers Rocks NR,Hartshorne,SwadlincoteSK32G05/04/19967Adultvc57_danes_bc_data
Shipley Park Visitor Centre,IlkestonSK44H02/04/19961Adultvc57_danes_bc_data
Clough Wood (nr gate entrance), Darley DaleSK26K23/03/19964Adultvc57_danes_bc_data
Carvers Rocks, Hartshorne, SwadlincoteSK32G02/04/19951Adultvc57_danes_bc_data
Carvers Rocks, Hartshorne, SwadlincoteSK32G02/04/19951Adultvc57_danes_bc_data
Shipley Park (Hoggs Pond), IlkestonSK44H18/03/19931Adultvc57_danes_bc_data
Shipley Park (Hoggs Pond), IlkestonSK44H18/03/19931Adultvc57_danes_bc_data
Parkway, New MillsSK08D20/03/19901Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B29/03/19891Adultvc57_danes_bc_data
Elvaston Park (Hall), DerbySK43B06/03/19891Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C02/08/19881Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C26/05/19881Adultvc57_danes_bc_data
Johnnygate, Barlow, ChesterfieldSK37C19/05/19881Adultvc57_danes_bc_data
Hellbank Plantation, Beeley (site not precise)SK26Y02/04/19821Adultvc57_danes_bc_data
Matlock (Teacher Training College)SK36A29/03/19821Adultvc57_danes_bc_data
Spring Wood NR, Calke (site not precise)SK32W09/02/198215Adultvc57_danes_bc_data
Carvers Rocks NR, Hartshorne, Swadlincote (site not precise)SK32G28/03/19811Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X24/03/19811Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X22/03/19811Adultvc57_danes_bc_data
Carvers Rocks NR, Hartshorne, Swadlincote (site not precise)SK32G14/03/198122Adultvc57_danes_bc_data
Carvers Rocks NR, Hartshorne, Swadlincote (site not precise)SK32G07/03/19813Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X16/04/19801Adultvc57_danes_bc_data
Upper Booth, EdaleSK08X12/04/19801Adultvc57_danes_bc_data
Carvers Rocks NR, Hartshorne, Swadlincote (site not precise)SK32G11/04/19801Adultvc57_danes_bc_data
Field Studies Building, Drakelow Nature TrailSK21J12/03/19789Adultvc57_danes_bc_data
Field Studies Building, Drakelow Nature TrailSK21J02/04/19771Adultvc57_danes_bc_data
Elvaston (castle balcony), DerbySK43B15/03/19732Adultvc57_danes_bc_data
Hell Bank Plantation, Beeley MoorSK26Y27/03/19711Adultvc57_danes_bc_data
Berry St, Hepthorne Lane, North WingfieldSK46C02/04/19681Adultvc57_danes_bc_data
Slagmill Plantation,Beeley MoorSK36E16/04/19631Adultvc57_danes_bc_data
Berry St, Hepthorne LaneSK46C11/04/19621Adultvc57_danes_bc_data
Berry St, Hepthorne Lane, North WingfieldSK46C11/04/19621Adultvc57_danes_bc_data
Beeley Moor, Beeley (site not precies)SK26Z07/04/19602Adultvc57_danes_bc_data
Beeley Moor, Beeley (site not precise)SK26Z07/04/19602Adultvc57_danes_bc_data
Beeley Plantation, Beeley Moor (site not precise)SK26T02/04/19602Adultvc57_danes_bc_data
Hell Bank Plantation, Beeley Moor (site not precise)SK26Z01/04/19593Adultvc57_danes_bc_data
Hell Bank Plantation, Beeley Moor (site not precise)SK26Z26/03/19591Adultvc57_danes_bc_data
Slagmill Plantation,Beeley MoorSK36E24/03/19593Adultvc57_danes_bc_data
Beeley Plantation, Bakewell (site not precise)SK26T30/03/19581Adultvc57_danes_bc_data
Slagmill Plantation,Beeley MoorSK36E30/03/19582Adultvc57_danes_bc_data
Beeley Plantation, Beeley (site not precise)SK26T30/03/19581Adultvc57_danes_bc_data
Froggatt (site not precise)SK27N01/01/19461Adultvc57_danes_bc_data
Repton Shrubs, Repton (site not precise)SK32B15/03/19281Adultvc57_danes_bc_data
Repton Shrubs, Repton (site not precise)SK32B01/05/19271Larvaevc57_danes_bc_data
Poolsbrook, Staveley (site not precise)SK47L01/04/19251Adultvc57_danes_bc_data
Eckington (site not precise)SK47J03/04/19241Adultvc57_danes_bc_data
Repton Shrubs, Repton (site not precise)SK32B01/01/19191Larvaevc57_danes_bc_data
Darley Dale (site not precise)SK26R20/03/19181Adultvc57_danes_bc_data
Coxbench (site not precise)SK34R24/03/19151Adultvc57_danes_bc_data
Repton Shrubs, Repton (site not precise)SK32B12/03/19151Adultvc57_danes_bc_data
Repton Shrubs, Repton (site not precise)SK32B01/05/19141Larvaevc57_danes_bc_data
Bakewell (site not precise)SK26J14/03/18941Adultvc57_danes_bc_data
Repton Shrubs, ReptonSK32B01/01/18851Adultvc57_danes_bc_data
Barrow on Trent, Derby (site not precise)SK32P01/01/18851Adultvc57_danes_bc_data
Repton Shrubs, ReptonSK32B01/01/18851Adultvc57_danes_bc_data
Barrow on Trent, Derby (site not precise)SK32P01/01/18851Adultvc57_danes_bc_data

Frosted Green       December Moth

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