Riverfly Biodiversity Action Plan (BAP) Species
Riverflies are at the heart of freshwater ecosystems and are a vital link in the aquatic food chain as a food source for fish and birds. There are eight rare and threatened riverflies which have been designated as conservation priorities by the UK Government and are listed on the UK Biodiversity Action Plan (BAP). This webpage gives details of the eight species and links to more detailed pages.
The eight riverflies designated as conservation priorities (BAP species) by the UK Government are:
Northern february red adult (Brachyptera putata) © Mike Hammett
Northern February red (Brachyptera putata): a stonefly that occurs only in Britain. It is found mainly in Scottish upland streams.
To find out more about the Northern February red click here.
Rare medium stonefly (Isogenus nubecula): only known to occur in the Welsh River Dee and may now be extinct.
To find out more about the Rare medium stonefly click here.
Scarce grey flag (Hydropsyche bulgaromanorum): a large caddisfly only known from stony areas on the River Arun in Sussex.
To find out more about the Scarce grey flag click here.
Scarce brown sedge (Ironoquia dubia): a caddisfly only known from three southern English sites, and there are no recent records for this species.
To find out more about the Scarce brown sedge click here.
Small grey sedge (Glossosoma intermedium) a caddisfly that has been found in only four Lake District streams; however there are no recent records for this species.
To find out more about the Small grey sedge click here.
Yellow mayfly adult (Potamanthus luteus) © Mike Hammett
Window-winged sedge (Hagenella clathrata) an orange mottled caddisfly that lives in pools on bogs and heathland at about ten sites in the UK.
To find out more about the Window-winged sedge click here. Southern iron blue (Baetis niger): a widespread mayfly species whose abundance appears to have declined in some areas by as much as 80% in recent decades.
To find out more about the Southern iron blue click here.
Yellow mayfly (Potamanthus luteus): an attractive, bright yellow mayfly that is found only on the River Wye on the Welsh borders.
To find out more about the Yellow mayfly click here.
To find out more about the Riverfly Partnership and the Riverfly BAP Project click here.