Species Detail - Yellow May Dun (Heptagenia sulphurea) - Species information displayed is based on the dataset "Littoral Macroinvertebrate Data From Irish Lakes".
Terrestrial Map - 10km
Terrestrial Map - 10km
Distribution of the number of records recorded within each 10km grid square (ITM).Marine Map - 50km
Marine Map - 50km
Distribution of the number of records recorded within each 50km grid square (WGS84).
Heptagenia sulphurea
Yellow May Dun
NHMSYS0000066973
RecommendedWell-formed
N/A
hesul
(Müller, 1776)
Insect - mayfly (Ephemeroptera)
Species
41
29
17
01/01/2001
03/09/2002
6 March (recorded in 2010)
14 October (recorded in 2015)
Environmental Protection Agency, Littoral Macroinvertebrate Data From Irish Lakes, National Biodiversity Data Centre, Ireland, Yellow May Dun (Heptagenia sulphurea), accessed 14 July 2025, <https://maps.biodiversityireland.ie/Dataset/38/Species/184321>