Species Detail - Yellow May Dun (Heptagenia sulphurea) - Species information displayed is based on the dataset "Ireland's BioBlitz".
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
7
7
7
21/05/2010
19/05/2012
6 March (recorded in 2010)
14 October (recorded in 2015)
Collated by the National Biodiversity Data Centre from different sources, Ireland's BioBlitz, National Biodiversity Data Centre, Ireland, Yellow May Dun (Heptagenia sulphurea), accessed 17 July 2025, <https://maps.biodiversityireland.ie/Dataset/189/Species/184321>