Australian Giant Mayfly vs Flat-headed Mayfly

Side-by-side species comparison

Attribute Australian Giant Mayfly Flat-headed Mayfly
Scientific Name Atalophlebia australis Epeorus assimilis
Order Ephemeroptera Ephemeroptera
Family Leptophlebiidae Heptageniidae
Size 12-18 mm 10-14 mm
Habitat Rivers & Streams Rivers & Streams
Diet Herbivores Herbivores
Regions Australia Europe
Conservation Least Concern Least Concern

Australian Giant Mayfly

One of the largest Australian mayflies, found in clean streams of southeastern Australia. Nymphs have feathery gills along their abdomens.

💡

Did You Know?

It belongs to the most species-rich mayfly family in the Southern Hemisphere.

Flat-headed Mayfly

A stream-dwelling mayfly nymph with a flattened body for clinging to rocks in rapids.

💡

Did You Know?

Its flattened nymph shape allows it to live in the boundary layer of fast currents.