Over all length 4 - 6mm. A small, broad-headed fly that likes to rest on the surface film of water. The head and thorax are a greenish/brown metallic colour. There are several similar species but the greenish colouration suggests Ephydra riparia.
Sheltered, well vegetated pools and edges of water bodies. The larvae are aquatic.
Status and distribution
Not very well recorded but with a wide distribution in southern Britain. Normally found on coastal sites.
Best time to see
March to April.