South American Giant Mayfly vs Autumn Dun
Side-by-side species comparison
| Attribute | South American Giant Mayfly | Autumn Dun |
|---|---|---|
| Scientific Name | Campsurus major | Leptophlebia marginata |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Polymitarcyidae | Leptophlebiidae |
| Size | 15-25 mm | 10-14 mm |
| Habitat | Rivers & Streams | Woodlands |
| Diet | Omnivores | Detritivores |
| Regions | South America | Europe |
| Conservation | Least Concern | Least Concern |
South American Giant Mayfly
A large tropical mayfly found in South American rivers and floodplains. Males have distinctive elongated forelegs used for grasping females during mating flights.
Did You Know?
Its mass emergences from Amazonian rivers provide a critical food pulse for fish and birds.
Autumn Dun
A dark-winged mayfly that emerges in spring despite its common name. Nymphs inhabit slow-flowing sections of woodland streams among leaf litter.
Did You Know?
Its common name refers to the brownish autumnal color of the adult, not its emergence season.