Brown Drake Mayfly vs Blue Doctor Butterfly
Side-by-side species comparison
| Attribute | Brown Drake Mayfly | Blue Doctor Butterfly |
|---|---|---|
| Scientific Name | Ephemera simulans | Rhetus periander |
| Order | Ephemeroptera | Lepidoptera |
| Family | Ephemeridae | Riodinidae |
| Size | 14-20 mm | 55-65 mm wingspan |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Herbivores |
| Regions | North America | South America (Brazil, Peru, Colombia, Ecuador, Venezuela, Bolivia) |
| Conservation | Least Concern | Least Concern |
Brown Drake Mayfly
A large brownish mayfly with mottled wings that produces dramatic evening hatches on trout streams. Nymphs burrow in sandy and silty streambeds.
Did You Know?
Brown drake hatches occur over just a few days each year, creating some of the most spectacular dry-fly fishing of the season.
Blue Doctor Butterfly
A large metalmark butterfly with brilliant metallic blue upperwings and distinctive red-spotted underwings with long tail streamers. It is one of the largest and most spectacular members of the family Riodinidae. Males are territorial and frequently seen perching on sunlit leaves.
Did You Know?
Despite being a metalmark butterfly rather than a swallowtail, it has evolved long tail streamers on its hindwings through convergent evolution.