Geometridae : Larentiinae
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Perizoma affinitata

(Stephens, 1831) 1802 / 70.132
Photo © Charles Fletcher, 20 May 2012,  SE323733 Hutton Conyers, VC65

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Small Rivulet
Perizoma alchemillata
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Yorkshire Status: Common and fairly widespread resident.

This species is present all over most of the county where the larvae feed on red campion. There has been little change in numbers or distribution. It is bivoltine in Yorkshire with two overlapping broods. Take care not to confuse it with the smaller Small Rivulet which emerges later. The usual feature used to separate these two species is the single indentation in the white central band (double in Small Rivulet) but this is not 100% reliable as Rivulet can sometimes show a small second indentation.

Sutton & Beaumont, 1989: Taken occasionally in all five vice-counties wherever its foodplant (red campion) occurs.

Recorded in 135 (68%) of 200 10k Squares.
First Recorded in 1883.
Last Recorded in 2023.
Additional Stats

< Twin-spot Carpet  |  Small Rivulet >
Forewing: 12-15mm
Flight: May - July, August - September
Foodplant:   Red Campion.
Red List Status: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 2
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
30/08/2023165SE37 - Ripon
23/08/2023162NZ61 - Guisborough
18/08/2023262TA08 - Scarborough
17/08/2023161TA17 - Bempton
15/08/2023462SE98 - Wykeham
  Immature   Adult   [Show Flight Weeks]
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
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