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.
|Year first recorded||1904||1968||1883||1883||1984|
|Year last recorded||2014||2013||2014||2014||2013|
|Number of records||59||44||276||106||11|
|Number of individuals||34||65||304||124||12|
For the county, we have a total of 496 records from 174 sites. First recorded in 1883.
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.