Season (Adult / Immature):
National Status: Nb
Local Status: Scarce and thinly distributed or restricted resident.
Local Record: Grade 2 See here for explanation
Flight time: One generation, Aug-Sep.
Foodplant: Silver and Downy Birch.
|Year first recorded||1940||1903||1875||1960||2001|
|Year last recorded||2014||2014||2014||2014||2009|
|Number of records||39||83||174||102||3|
|Number of individuals||36||106||193||129||3|
For the county, we have a total of 401 records from 183 sites. First recorded in 1875.
Sutton & Beaumont, 1989: Recorded both from low-lying heaths and from higher areas where there is mature birch woodland. Central and eastern Yorkshire represents the northern part of the range in England of this distinctly Midlands species. It also occurs in Scotland.
Argus 47, 2001-04:
VC65. Hutton Conyers, 15.8.2001 (CHF); Catterick Garrison, 11.8.2004 (MS). NEW VICE-COUNTY RECORD.
2012 (CHF): This species still remains local in the county in birch woodland but numbers have been good recently (30 - 40 records per year) and there has been spread towards eastern areas of VC61 and slight spread to the north west. Waring's comments that it can be locally numerous are not really true in Yorkshire as there have been no counts in double figures anywhere in the county.