Nymph identification: size 0.5 to 7 mm. Easily identified due to the 5-8 filamentous or thread–like gills on its prosternum (ventral part of the 1st segment of the thorax)
Found in highest densities amongst leaf-packs and particularly mosses in fast flowing reaches of stony streams and rivers. It is also known to occur in lakes with stony shorelines.
Univoltine - produces one brood in a year. Adult flight period is from April to September. Nymphs present from August to July.
Common and widespread throughtout the country. Has been recorded from 269 10km squares in Ireland.
Records submitted to Data Centre in 2021
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H.B. Feeley, J-R. Baars & M. Kelly-Quinn (2016) . National Biodiversity Data Centre, Waterford. Ireland.