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70.018 (BF1715)

Plain Wave   

Idaea straminata
Adult: 2
Resident, scarce, widespread. Scattered locally throughout the UK,


Status is unclear due to confusion with the un-banded form of the Riband Wave. The subterminal line is prominent and curved towards the costa whereas it is sharply angled in the Riband Wave.  A quality photo is required for a record to be accepted.

Life cycle

One generation. Overwinters as a larva during August to May, with pupation among plant debris.

Larval foodplants

Larval foodplant not known in the wild.


Open woodland, scrub and some gardens.


First recorded in Dumfries and Galloway in VC72 in 1862 on the Tinwald Downs, Dumfries by Lennon who said it was ‘very rare’.  The first record for VC74 was not until 1983 from Clayshant, Torrs Warren in 1983 by Duncan and for VC73 in 1990 at Mabie Forest in the Rothamsted moth trap.

40 record(s) from 15 hectad(s) in D&G

VC74 VC73 VC72
Last recorded 1983 2022 2022

 UK Moths website - further information on species (with photos)

 East Scotland Butterfly Conservation website - national distribution maps and phenology

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