Morley's Final Catalogue: Common everywhere on birch. Bentley Woods (Pyett), Aldeburgh (Ctw), Leiston (Grey), Lowestoft 1936 (Gd).

Recent Status: A common species in Suffolk.

Life Style: A double brooded species that has been recorded from April to September. The larvae feed on Betula. They pupate in a tough white cocoon in the larval habitation. The pupal stage passes the winter.

Identification: The moth has a single shining white fascia and a long basal streak. There is a basal dorsal mark that is wide distally. Beyond the fascia there are two dorsal and three costal shining white marks arranged alternately. There is a terminal black mark and line in the cilia. The white marks are broadly dark edged on a variable ground colour of ochreous brown with darker suffusion.
The larvae create a long blister blotch between veins on the underside that significantly distorts the leaf. It has between one and six creases in the lower epidermis and is 8 to 14mm long at maturity. More Info

	Determination by Genitalia Examination (gen. det.) Required

Recorded in 41 (71%) of 58 10k Squares. First Recorded in 1936. Last Recorded in 2025. Additional Stats

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