Black Mayfly vs Western Ameletid Mayfly
Side-by-side species comparison
| Attribute | Black Mayfly | Western Ameletid Mayfly |
|---|---|---|
| Scientific Name | Ephemera danica var. nigra | Ameletus cooki |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Ephemeridae | Ameletidae |
| Size | 15-25 mm body | 8-12 mm |
| Habitat | Rivers & Streams | Mountains |
| Diet | Omnivores | Omnivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
Black Mayfly
A dark color variant of the common Green Drake mayfly found in some European populations. The dark form is more prevalent in upland, acidic waters. Important for trout feeding.
Did You Know?
The dark form predominates in acidic upland streams while the typical yellow form prefers alkaline lowland rivers.
Western Ameletid Mayfly
A streamlined mayfly found in cold mountain streams of the Pacific Northwest. Nymphs are agile swimmers that dart between cobbles in riffles.
Did You Know?
Nymphs are strong enough swimmers to move upstream against moderate currents.