Black Mayfly vs Yellow-legged Dance Fly
Side-by-side species comparison
| Attribute | Black Mayfly | Yellow-legged Dance Fly |
|---|---|---|
| Scientific Name | Ephemera danica var. nigra | Empis livida |
| Order | Ephemeroptera | Diptera |
| Family | Ephemeridae | Empididae |
| Size | 15-25 mm body | 7-10 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Nectar Feeders |
| Regions | Europe | Europe |
| 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.
Yellow-legged Dance Fly
A medium-sized dance fly with yellowish legs, a grayish body, and a distinctive long proboscis. It forms conspicuous mating swarms near streams and in sheltered clearings.
Did You Know?
In some dance fly species, males wrap worthless objects in silk to trick females into mating, a form of sexual deception.