Five-spotted Snailkiller

Hydromya dorsalis


Over all length 5.5mm. The most striking feature of this fly is the five spots on the fore-wing, four of the spots in a straight line. The thorax is grey/blue and the abdomen and legs are red/brown.


Marshy places with rushes and sedges. The larvae feed on aquatic snails.

Status and distribution

Common and widespread throughout Britain. Common in Nottinghamshire and at Netherfield Lagoons.

Best time to see

All year.