Geometridae : Sterrhinae
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Photo © Melissa Banthorpe,  The Lodge RSPB Sandy 02/08/2008

Similar Bedfordshire Species
Riband Wave
Idaea aversata
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Plain Wave
Idaea straminata

(Borkhausen, 1794) 1715 / 70.018

Bedfordshire status
Uncommon resident

This species is easily confused with the more common Riband Wave Idaea aversata. Plain Wave has a restricted distribution in the county, mainly on the heaths along the Greensand Ridge especially The Lodge (RSPB Sandy).

Some older records away from this area may be errors where there are no supporting photographs or other evidence.

Verification Grade Comment: Acceptable flight time in county: 10 July to 10 August

Retained Specimen / Photograph will be Required.

Recorded in 9 (41%) of 22 10k Squares.
First Recorded in 1908.
Last Recorded in 2021.
Additional Stats

< Portland Ribbon Wave  |  Lace Border >

Determination
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
22/07/2021930TL14 - Biggleswade (West), Sandy
13/07/2019130TL14 - Biggleswade (West), Sandy
11/07/2019130TL14 - Biggleswade (West), Sandy
24/07/2018130TL14 - Biggleswade (West), Sandy
02/07/2018130TL14 - Biggleswade (West), Sandy
Show Details | 1990 to 2022 | 2000 to 2022 | Graph Key
Express Record Plain Wave
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Forewing: 13-15mm.
Flight: One generation. June-Aug.
Foodplant:   Dandelion, Knotgrass
Red List: Least Concern (LC)
GB Status: Common
Former Status: Local
Verification Grade:  Adult: 3
 Immature Adult
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