Nymph identification: 1.1 to 33 mm in size. Perlidae are identifiable by the thoracic gills, with P. bipunctata nymphs tending to be much lighter in colour than D. cephalotes.
Fast flowing streams and rivers with stable substrata.
This species has a merovoltine life history, taking an estimated three years to complete its life cycle. Adult flight period is from April to July and nymphs are present all year.
Common and widespread especially in south, west and north west. Has bee recorded from 202 10km squares in Ireland.
Records submitted to Data Centre in 2020
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H.B. Feeley, J-R. Baars & M. Kelly-Quinn (2016) The Stonefly (Plecoptera) of Ireland –
Distribution, Life Histories & Ecology. National Biodiversity Data Centre, Waterford. Ireland.