Light Cahill Mayfly vs Green Drake Mayfly
Side-by-side species comparison
| Attribute | Light Cahill Mayfly | Green Drake Mayfly |
|---|---|---|
| Scientific Name | Heptagenia solitaria | Ephemera guttulata |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Heptageniidae | Ephemeridae |
| Size | 9-13 mm | 18-25 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | North America | Eastern North America |
| Conservation | Least Concern | Least Concern |
Light Cahill Mayfly
A pale-colored mayfly highly prized by fly fishers for imitating hatches. Nymphs prefer moderate current over gravel substrates.
Did You Know?
The Light Cahill dry fly pattern, designed to mimic this species, has been used since the 1880s.
Green Drake Mayfly
A large and strikingly beautiful mayfly with mottled wings that emerges in late spring. Its hatches on eastern North American streams create some of the year's best fly-fishing opportunities.
Did You Know?
Green drake hatches trigger a feeding frenzy among trout, with even the largest fish rising to the surface.