Species Account

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Summary Data

Season (Adult / Immature):

National Status: Local

Local Status: Scarce and thinly distributed or restricted resident.

Local Record: Grade 3   See here for explanation

Flight time: One generation, Jun-Aug.

Forewing: 13-15mm.

Foodplant: Unknown.

Regional breakdown:

Year first recorded19041968188318831984
Year last recorded20142013201420142013
Number of records594427610611
Number of individuals346530412412
Unique positions332869427
Unique locations332372406
Adult records564226310311
Immature records00000

For the county, we have a total of 496 records from 174 sites. First recorded in 1883.


70.018 Plain Wave 03
© Terry Box, 2 Aug 2020
70.018 Plain Wave 02
© Andy Nunn
70.018 Plain Wave 01
© John William Cooper

Species Account

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, 2001-04:
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.

See background to species accounts.  Index of Vernacular names - Search - Random Species