The Sepsidae are a family of true flies (Diptera) consisting of 29 species recorded for the British Isles. The majority of species are shiny black ant-like flies, especially the genus Sepsis which may be familiar from their wing-waving displays on the flowers of umbels and around cowpats. The exception to that description is the large and brown seaweed breeding species, Orygma luctuosum, which is found in and around beds of rotting weed on beaches.
How to get involved
Records can be submitted on iRecord or on spreadsheets to the organizer.
Data collected will be shared to the NBN Atlas.