Baetis

Baetis is a genus of mayflies of the family Baetidae, known as the blue-winged olive to anglers.

There are at least 150 described species in Baetis.

[1][2][3][4] They are distributed worldwide, with the most variety in North America and northern Europe.

[5] About 48 species occur in Europe including:[6]

Male imago of Baetis tricaudatus
Baetis sahoensis