Jan Hamrsky / Hacklegill mayfy nymph (Potamanthus luteus), Europe, July. Controlled conditions.

Bence Mate / Tisza mayflies (Palingania longicauda) swarming, River Tisza, Hungary

David Maitland / Close up of head of a male miniature Blue-winged olive mayfly (Acentrella sp). The male mayflys head is dominated by its remarkable red 'Turbinate' compound eyes which, directed upwards and phenomenal...

Stephen Dalton / Mayfly (Ephemeroptera) at rest on flower. UK.

Solvin Zankl / Mating swarm of Long-tailed / Tisza mayflies (Palingenia longicauda) Tisza river, Hungary, Every female is approached by several mature males. Eventually the female mates with one of them on the water...

Solvin Zankl / Mating swarm of Long-tailed / Tisza mayfly(Palingenia longicauda) Every female is approached by several mature males. Eventually the female mates with one of them on the water surface. June 2008

Solvin Zankl / Aquatic larva of the Long-tailed / Tisza mayfly(Palingania longicauda) shoveling and digging. These larvae live for several years in the clay of the river bed of the Tisza River. Hungary, Central Euro...

Solvin Zankl / Aquatic larva of the Long-tailed / Tisza mayfly(Palingania longicauda) These larvae live for several years in the clay of the river bed of the Tisza River. Hungary, Central Europe.

Solvin Zankl / Female Long-tailed / Tisza mayfly (Palingani a longicauda) rise up in the air soon after mating, where they form huge swarms and are out of range from males still searching for mates close to the wate...

Solvin Zankl / Female Long-tailed / Tisza mayfly (Palingani a longicauda) rise up in the air soon after mating, where they form huge swarms and are out of range from males still searching for mates close to the wate...

Solvin Zankl / Just three hours after they hatch from the water and moult into mature adults, the male Long-tailed / Tisza mayfly (Palingenia longicauda) perish. Adult mayflies have no mouth opening and no guts. The...

Solvin Zankl / Immediately after hatching from their aquatic larval skin the subadult male Long-tailed / Tisza mayfly(Palingania longicauda) flies towards the river bank to land on a leaf. Here it will undergo its l...