Very variable - from pale to nearly all black in extreme cases
Photo of eggs © Mark Pewtress
Scottish Status: Common NE, local and scarcer elsewhere - decline, especially in NE UK Status: Local
A severe long-term decrease in UK distribution and abundance (cf: Atlas of Britain & Ireland's Larger Moths)
First and last flight dates recorded in Caithness: Spring: 5th March to 18th May Autumn: 26th August to 22nd November
MAP: black dots last record pre 2000, blue dots last record 2000 to2009,
red dots last record 2010 to 2019 green dots last record 2020 to present
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