Cahill Mayfly vs Australian Giant Mayfly

Side-by-side species comparison

Attribute Cahill Mayfly Australian Giant Mayfly
Scientific Name Stenacron interpunctatum Atalophlebia australis
Order Ephemeroptera Ephemeroptera
Family Heptageniidae Leptophlebiidae
Size 8-12 mm 12-18 mm
Habitat Rivers & Streams Rivers & Streams
Diet Detritivores Herbivores
Regions North America Australia
Conservation Least Concern Least Concern

Cahill Mayfly

A cream-to-tan colored mayfly found throughout eastern North America. It is named after the classic Light Cahill fly fishing pattern it inspired.

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Did You Know?

The Light Cahill fly pattern, inspired by this mayfly, has been a staple of American fly fishing since the 1880s.

Australian Giant Mayfly

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

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Did You Know?

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