Pale Morning Dun vs Japanese Burrowing Mayfly
Side-by-side species comparison
| Attribute | Pale Morning Dun | Japanese Burrowing Mayfly |
|---|---|---|
| Scientific Name | Ephemerella excrucians | Ephemera japonica |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Ephemerellidae | Ephemeridae |
| Size | 7-10 mm | 15-25 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | North America | Japan, East Asia |
| Conservation | Least Concern | Least Concern |
Pale Morning Dun
A small pale yellowish mayfly that hatches in large numbers on western North American streams during late spring. It is a crucial food source for trout.
Did You Know?
Pale morning duns often hatch in such dense swarms that trout become highly selective, ignoring all but perfect imitations.
Japanese Burrowing Mayfly
A large burrowing mayfly native to Japanese rivers and streams. It emerges in large numbers during early summer evenings.
Did You Know?
It is culturally significant in Japan, where mayfly emergence has been celebrated in poetry for centuries.