Mayflies

Mayfly nymph Photographers - John Gooderham and Edward Tsyrlin

Ephemeroptera

Mayfly nymphs are aquatic with lateral abdominal gills and three filaments or tails arising from the tip of the abdomen.

The nymphs live for a few months up to a year in streams before they emerge as adults.

The adults do not feed and the adult life span is very brief (no more than 24 hours). They fly near streams usually in mating swarms.