Geometridae : Larentiinae
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Photo © Ben Sale,  Scales Park, Hertfordshire (08/07/17)

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Similar Herts & Middlesex Species: None
 
Scallop Shell
Rheumaptera undulata

(Linnaeus, 1758) 1789 / 70.121
=Hydria undulata

General comments:
Extremely local resident / vagrant

Probably long gone from Middlesex. It was noted at Hampstead and Harefield in 1887 and then the Ruislip area in 1955; there are no other Middlesex records. In Hertfordshire, there are recent reports from Bovingdon Brick Pits and Berkhamsted in the west and from Scales Park and Royston in the north-east - all sites appearing potentially likely to support breeding populations. More investigation is clearly called for. The recent central Herts record is from the Hertford town area and away from any potential breeding habitat. We have not been able to re-find it at historic sites at Wick Wood, Tring and at Chorleywood.

Recorded in 10 (24%) of 41 10k Squares.
First Recorded in 1901.
Last Recorded in 2023.
Additional Stats

< Argent & Sable  |  Scarce Tissue >

List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
21/07/2023120SP91 - Tring
15/06/2022120TL43 - Meesden / Barley
24/06/2020120TL43 - Meesden / Barley
17/07/2019120TL43 - Meesden / Barley
10/07/2019120SP90 - Berkhamsted
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record Scallop Shell
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VC20 VC21 VC21 VC20
Click Map for Details
Forewing: 16-19mm.
Flight: One generation June-July.
Foodplant:   Sallows, Aspen, Billberry
Red List: Least Concern (LC)
GB Status: Common
Former Status: Local
Verification Grade:  Adult: 1
 Immature Adult   [Show Flight Weeks]
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