Fig 1
ADULT: Wingspan 70-80mm.  Variable in colour and design especially forewing markings.  The central cross-band is occasionally broken with the background colour varying from yellow-brown to reddish-brown becoming greenish towards the jagged trailing edge.  A whitish patch is present near the forewing tips.   The hindwings are yellowish-brown. CHRYSALIS: Dark grey-brown with wrinkled surface.  Located at base of lime and elm.  Found throughout winter. LARVA: July to September on lime, alder and birch usually towards the canopy. BEHAVIOUR: Attracted to light. HABITAT: Deciduous woodland where foodplant grows.  Also parks and gardens. FLIGHT PERIOD: Single brooded.  May to June.  STATUS: Resident.  Common.

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