Morley’s Final Catalogue: Somewhat local among birch. Sutton (Whit) and Hollesley heaths (Wir) in 1934; Leiston (Grey); Beccles (Crf); Bury (Wrt). Always common in Blythburgh Wood in September and late August (D), the spotted typical form about double as frequent as the suffused one, which alone occurs on alder in Bentley Woods and in mid- September at Foxhall, where on 10 September 1904 one totally suffused was captured (Mly).
Recent Status: A common species in Suffolk.
Life Style: A single brooded species flying late in summer from July till October and coming to light. The larvae feed inside twigs and catkins of Betula species. They pupate in a cocoon on the ground.
Identification: The moth is typically pale winged, characterised by a sub-triangular dark mark on the dorsum at one quarter. There is also dark suffusion pre-ocellus and apically. The dark suffusion may be more extensive and gives rise to another common form where the entire dorsal half is dark, resulting in sharply defined pale and dark, costal and dorsal sections. More Info
Recorded in 31 (53%) of 58 10k Squares. First Recorded in 1904. Last Recorded in 2021. Additional Stats