Fig 1
ADULT: Wingspan 45 - 50mm. Easily identifiable and can only be confused with Swallow Prominent if care is not taken. The main diagnostic feature is the short and thick white wedge which extends from the trailing corner and only reaches to about a third of the way to the wing base. In Swallow Prominent this line is thinner but extends to well over halfway. CHRYSALIS: Pupates underground in a sturdy cocoon. LARVA: Feeds on birch. BEHAVIOUR: Attracted to light. HABITAT: Gardens, woodlands, heathlands and hedgerows. FLIGHT PERIOD: Double brooded. April to June and again in July to August. STATUS: Resident.  Common throughout the mainland.

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