Geometridae : Larentiinae
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Photo © Bill Urwin

Similar Norfolk Species
Treble-bar
Aplocera plagiata
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Lesser Treble-bar
Aplocera efformata

(Guenée, 1857) 1868 / 70.193

Norfolk status
Much rarer than Treble-bar.

Lesser Treble-bar is usually slightly smaller, with less intense dark cross-bands.
The most reliable way to separate the two species is by looking at the tip of the abdomen.

Treble-bar Male has a straighter, more pointed abdomen tip.
Female showing a distinctive tubular shape to the terminal segment of the abdomen.

Lesser Treble-bar Male abdomen is shorter and blunter, with slightly curved claspers.
Female abdomen blunt. This is less obvious and care should be taken.

(see abdomen comparison diagram)

Please retain / photograph all possible Lesser Treble-bar specimens.

Retained Specimen / Photograph will be Required.

Recorded in 21 (28%) of 74 10k Squares.
First Recorded in 1940.
Last Recorded in 2023.
Additional Stats

< Treble-bar | Streak >

Determination
Treble-bar and Lesser Treble-bar abdomen comparison - J. Wheeler
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10kGeneral Area
01/09/2023128TF41West Walton
22/08/2023128TF62King's Lynn
26/06/2023+28TL79Cranwich Heath
03/09/2022128TF51Walpole Highway
29/08/2022127TG20Poringland
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record Lesser Treble-bar
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Copyright © Lepidoptera UK 2024
   
Click Map for Details

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forewing: 16-19mm.
Flight: Two generations May-June. Aug-Sept.
Foodplant:   St John's-worts
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 3
 Immature Adult   [Show Flight Times]

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Underlying maps using Digital Map Data © NOLA™ 2024. © Lepidoptera UK - Jim Wheeler - Norfolk Moths 2007 - 2024. Data © NOLA™ 2024
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