Geometridae : Larentiinae
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Photo © Roger Prue,  Hemel Hempstead, Hertfordshire (13/05/17)

Similar Herts & Middlesex Species
Small Rivulet
Perizoma alchemillata
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Rivulet
Perizoma affinitata

(Stephens, 1831) 1802 / 70.132

General comments:
Widespread but local resident.

Separation of this species from Small Rivulet must not be performed on the basis of size, since both species vary in size considerably. The character given in Skinner (1984; 1998) works on all Hertfordshire and Middlesex material examined. The absence of woodlands or hedgerows with Red Campion in parts of the area is reflected in the distribution map, but there is a reasonable probability that the species is partly overlooked in Middlesex. There is slowly emerging evidence that the species may be in decline here, since it is reported as having vanished from a number of sites where it was presumed established.

Recorded in 22 (54%) of 41 10k Squares.
First Recorded in 1887.
Last Recorded in 2023.
Additional Stats

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List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
10/08/2023121TQ17 - Brentford / Hounslow / Richmond
11/07/2022120SP91 - Tring
26/05/2022120TL31 - Hertford
24/07/2020120TL21 - Welwyn Garden City
27/05/2020120TL41 - Sawbridgeworth / Bishop's Stortford
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record Rivulet
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VC20 VC21 VC21 VC20
Click Map for Details
Forewing: 12-15mm.
Flight: Two generations May-July. Aug-Sept.
Foodplant:   Red Campion
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 1
 Immature Adult   [Show Flight Weeks]
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