Season (Adult / Immature):
National Status: Common
Local Status: Scarce and thinly distributed or restricted resident.
Local Record: Grade 1 See here for explanation
Flight time: One generation, Feb-Mar.
Foodplant: Silver and Downy Birch.
|Year first recorded||1940||1883||1847||1883||1883|
|Year last recorded||2013||2014||2014||2014||2015|
|Number of records||33||220||210||194||26|
|Number of individuals||442||976||421||686||55|
For the county, we have a total of 683 records from 203 sites. First recorded in 1847.
Sutton & Beaumont, 1989: Often the first of the larger moths to emerge, this species is generally common in areas of well established birch but scarce elsewhere. Recorded from all five vice-counties, although only in the west of VC61.
2012 (CHF): The comments in 1989 are still true. It can be very common in birch woodland in March but uncommon elsewhere.