This page displays information about a species Ephemera sp., which I have so far only been able to identify up to the genus level, but which I suspect could be a definable species based on the photos.
Ephemera sp. imago Osterseen b. Seeshaupt, Germany, 10/07/2020 Ephemera sp. imago Osterseen b. Seeshaupt, Germany, 10/07/2020 Ephemera sp. imago Osterseen b. Seeshaupt, Germany, 10/07/2020 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012 Ephemera sp. imago Kleine Osterseen b. Seeshaupt am Starnberger See, Germany, 22/06/2012
