Common in woodland, scrub and gardens throughout the British Isles. Widespread and common in Hampshire and on the Isle of Wight. Wingspan 32-35 mm. The main confusion species is Common Wave C. exanthemata, in which cross-lines are brown and curved. Larva feeds on Downy and Silver Birch, Alder and Sallow, over-wintering as a pupa.
The abundance in each month is indicated as follows:
No records
Very occasional
Irregular
Uncommon
Off-peak, but not unusual
Off-peak, but not unusual
Main flight time