Local in damp woodland, fens, marshes, and along river-banks throughout much of England. In Hampshire and on the Isle of Wight widespread though not usually very common. Wingspan 26-32 mm. The most likely confusion species is Olive I. subtusa
, which see for differences. Larva feeds on Sallow, Eared Willow, Grey Willow, Goat Willow and Black Poplar, over-wintering as an egg.