Blue Doctor Butterfly vs Pale Evening Dun
Side-by-side species comparison
| Attribute | Blue Doctor Butterfly | Pale Evening Dun |
|---|---|---|
| Scientific Name | Rhetus periander | Heptagenia adaequata |
| Order | Lepidoptera | Ephemeroptera |
| Family | Riodinidae | Heptageniidae |
| Size | 55-65 mm wingspan | 8-12 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Herbivores | Omnivores |
| Regions | South America (Brazil, Peru, Colombia, Ecuador, Venezuela, Bolivia) | Europe |
| Conservation | Least Concern | Least Concern |
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.
Pale Evening Dun
A flat-bodied mayfly whose nymphs press tightly against rocks in swift currents. Adults emerge at dusk during summer months.
Did You Know?
Its extremely flattened body allows it to resist currents that would sweep away most other insects.