Drepanidae : Thyatirinae
  Prev | Next  
Photo © David Hunt,  Harpenden, Hertfordshire (03/23)

Immature stages

Similar Herts & Middlesex Species
Poplar Lutestring
Tethea or
Upload a Photo
Yellow Horned
Achlya flavicornis

(Linnaeus, 1758) 1659 / 65.016

General comments:
Widespread and Local in Hertfordshire, but Absent from all but the northern edge of Middlesex. British examples of this species relate to subspecies galbanus (Tutt); the nominotypical subspecies is absent from Britain.

Hertfordshire Notes:
Grey forms approaching the appearance of the typical subspecies found in Europe occur at relatively low density, perhaps 15 to 20 per cent of the Hertfordshire population during 1995 to 2006, but these are melanic galbanus and not true flavicornis. It is of interest that Ian Lorimer, recorded it as 'Fairly common. All melanic' at Totteridge during 1979. The adult is attracted easily to light if the trap is placed directly under birch trees. At Hares Garden Wood near Tring on 13th February 2004 a trap placed against the trunk of an isolated mature birch caught this species as predicted to an incredulous audience whilst none of the other nearby traps caught any, in spite of there being a smattering of birch trees throughout the woodland. Three unusually late dates recorded in the county are 4th May 2003 at Whippendell Wood (Dave Murray), 16th May 1896 at Bricket Wood (S. H. Spencer) and on 3rd June 2004 at Thunderfield Grove (Mark Cooper). The flight chart excludes historical data.

Middlesex Notes: This moth has a distribution near identical to that of 65.001 Falcaria lacertinaria, also a birch associate, with known sites closely hugging the Hertfordshire border along the whole length (the North London Woodlands), but quite absent from any other part of the county.

Recorded in 20 (49%) of 41 10k Squares.
First Recorded in 1896.
Last Recorded in 2023.
Additional Stats

< Frosted Green  |  December Moth >

List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
01/05/2023120TL31 - Hertford
19/03/2023120TL11 - Harpenden / Wheathampstead
18/03/2023120TL42 - Bishop's Stortford (N)
17/03/2023121TQ08 - Uxbridge
16/03/2023120SP90 - Berkhamsted
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record Yellow Horned
We need your records!
Do you have records of Yellow Horned?
Put your own dot on the map!

Copyright © Lepidoptera UK 2024

VC20 VC21 VC21 VC20
Click Map for Details
Forewing: 17-20mm.
Flight: One generation. Feb-April.
Foodplant:   Silver and Downy Birch
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 1
 Immature Adult   [Show Flight Weeks]
© hertsmiddxmoths.uk 2024 NOLA®; Database using MapMate® Digital Maps © Bartholomew 2010. Design © Jim Wheeler 2024
This site requires necessary cookies to function correctly. We'd also like to set Google analytics cookies that help us make improvements by measuring how you use the site. These will be set only if you accept all cookies. Necessary cookies enable core functionality such as security, network management, and accessibility. You may disable these by changing your browser settings, but this will affect how the website functions. Cookies Policy