Yorkshire Status: Scarce and thinly distributed or restricted resident.
Sutton & Beaumont, 1989: Much less commonly recorded than the last species and not reported from the north and west of the County. It may be that confusion with the plain form of I. aversata (Linnaeus) causes under-recording.
Argus 47, 2001-2004:
VC65. High Batts, 8.7.1984 (SPW). NEW VICE-COUNTY RECORD.
2012 (CHF): Much less common than Riband Wave and often confused with this species. The diagnostic kink in the sub-terminal line in Riband Wave can at times be confusing. Plain Wave is usually a little smaller and has a more silky appearance. One feature not mentioned in the books is that Riband Wave has alternate dashes and dots along the edge of the wing whilst Plain Wave has just dashes, though these may disappear in worn specimens.
Retained Specimen / Photograph will be Required.
Recorded in 88 (44%) of 200 10k Squares. First Recorded in 1883. Last Recorded in 2022. Additional Stats