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Fern
Horisme tersata ([Denis & Schiffermüller], 1775)
Geometridae: Larentiinae
1782 / 70.127
Photo © Ian Walker,  31/07/2013 - Hilltop, Cley, Norfolk

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Similar Species
Cryptic Fern
Horisme radicaria
Forewing: 14-18mm.
Flight: One generation June-Aug.
Foodplant:   Traveller's-joy.
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 2
Status
Local.
Calcareous soil habitats.

The Fern Horisme tersata, has now been split in to two species. The new Cryptic Fern Horisme radicaria appears to have been hiding in plain sight for a number of years. Extremely hard to separate and dissection required to confirm any potential specimens of Cryptic Fern. See next species.

Recorded in 37 (50%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2024.
Additional Stats

Latest 10 Records
Date#VC10kArea
23/09/2024127TG04Cley next the Sea
18/09/2024127TG04Cley next the Sea
01/09/2024128TL79Mundford
30/08/2024127TG04Cley next the Sea
29/08/2024127TG04Cley next the Sea
23/08/2024127TG04Cley next the Sea
22/08/2024127TG04Cley next the Sea
12/08/2024127TG04Cley next the Sea
11/08/2024127TG04Cley next the Sea
10/08/2024227TG04Cley next the Sea
Further info: Horisme tersata
 
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