Length about 13 mm. The wing pattern is variable but the shape of the head and the degree of darkening on the front femora are diagnostic. The wing is slightly shaded.
Streams, woods and well vegetated damp places.
April and May.
The larvae live in marshy places.
Widespread but rather local in Britain.
Local and rather infrequent in Leicestershire and Rutland.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015