
''Cloeon dipterum'' is a species of mayfly with a Holarctic distribution. It is the most common mayfly in ponds in the British Isles and the only ovoviviparous mayfly in Europe. Males differ from females in having turbinate eyes.
Similar species: Mayflies
By Pudding4brains
Public Domain
Uploaded Jun 3, 2018. Captured in Groene Bruglaan 9, 7602 RE Almelo, Netherlands.