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    • Heptagenia
  • (7)
Flathead mayfly nymph (Heptagenia flava), on piece of submerged wood, Europe, June, controlled conditions
01608848
Jan Hamrsky / Flathead mayfly nymph (Heptagenia flava), on piece of submerged wood, Europe, June, controlled conditions
Flathead mayfly nymph (Heptagenia flava), on piece of submerged wood, Europe, June, controlled conditions
01608847
Jan Hamrsky / Flathead mayfly nymph (Heptagenia flava), on piece of submerged wood, Europe, June, controlled conditions
Flathead mayfly nymph (Heptagenia flava), underwater, Europe, June, controlled conditions
01608845
Jan Hamrsky / Flathead mayfly nymph (Heptagenia flava), underwater, Europe, June, controlled conditions
Flathead mayfly nymph (Heptagenia flava), expelling waste, Europe, June, controlled conditions
01608844
Jan Hamrsky / Flathead mayfly nymph (Heptagenia flava), expelling waste, Europe, June, controlled conditions
Flathead mayfly nymph (Heptagenia flava), underwater, Europe, June, controlled conditions
01608843
Jan Hamrsky / Flathead mayfly nymph (Heptagenia flava), underwater, Europe, June, controlled conditions
Flathead mayfly nymph (Heptagenia flava), underwater, Europe, June, controlled conditions
01608842
Jan Hamrsky / Flathead mayfly nymph (Heptagenia flava), underwater, Europe, June, controlled conditions
Yellow dun mayfly (Heptagenia sulphurea) female, River Usk, Wales, UK, May.
01593611
Phil Savoie / Yellow dun mayfly (Heptagenia sulphurea) female, River Usk, Wales, UK, May.