Yellow mayfly
The Yellow mayfly is one of the 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 Yellow mayfly and has links to more detailed documents.
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| Yellow mayfly adult (Potamanthus luteus) © Mike Hammett |
Yellow mayfly (Potamanthus luteus)
This mayfly is only found on the river Wye and prefers mobile shingle habitat with larger stones. The adults emerge from the water and fly between May and late October (peaking in July). This species is vulnerable to poor water quality through pollution events, changes in bankside and river vegetation and low flows caused by abstraction. Other factors thought to be contributing to its decline include: suspended silt, dredging, loss of side channels, channels with too much vegetation and excessive bankside light.
To see the Yellow mayfly (Potamanthus luteus) Species Dossier click here.
To see the Yellow mayfly (Potamanthus luteus) Summary Sheet click here (for the Welsh version click here).
To find out more about the Riverfly Partnership and the Riverfly BAP Project click here.
