Black Mayfly vs White Miller Mayfly
Side-by-side species comparison
| Attribute | Black Mayfly | White Miller Mayfly |
|---|---|---|
| Scientific Name | Ephemera danica var. nigra | Ephoron virgo |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Ephemeridae | Polymitarcyidae |
| Size | 15-25 mm body | 12-18 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | Europe | Europe, Western Asia |
| 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.
White Miller Mayfly
A white-bodied European mayfly that emerges in enormous synchronized swarms at dusk. Females are unique among mayflies in that they moult directly into the spinner stage.
Did You Know?
Swarms at bridges and streetlights can be so thick they cause traffic hazards.