A rare Red Data Book species, protected under the UK Wildlife and Countryside Act, and a priority species under the UK Biodiversity Action Plan. Found in fens, marshes and other damp areas (dry open areas in Europe); 0-50 m (0-1500 m in Europe) in parts of East Anglia, also appearing as a migrant in the south of England; mainland Europe and Fennoscandia. In Hampshire and on the Isle of Wight an occasional and rare immigrant. Wingspan 64-100 mm. Larva feeds on Milk-parsley and Fennel.

Flightime guide
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