Small Amber Spinner vs Pale Morning Dun
Side-by-side species comparison
| Attribute | Small Amber Spinner | Pale Morning Dun |
|---|---|---|
| Scientific Name | Caenis macrura | Ephemerella excrucians |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Caenidae | Ephemerellidae |
| Size | 3-5 mm | 7-10 mm |
| Habitat | Ponds & Lakes | Rivers & Streams |
| Diet | Omnivores | Detritivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
Small Amber Spinner
A tiny mayfly whose amber-colored spinners fall to the water in dense clouds. Nymphs live among fine sediments in slow-flowing water.
Did You Know?
Spinner falls can be so dense they coat the water surface like a film, triggering frenzied fish feeding.
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.