March Brown Mayfly vs Neotropical Blue Hairstreak
Side-by-side species comparison
| Attribute | March Brown Mayfly | Neotropical Blue Hairstreak |
|---|---|---|
| Scientific Name | Rhithrogena germanica | Pseudolycaena marsyas |
| Order | Ephemeroptera | Lepidoptera |
| Family | Heptageniidae | Lycaenidae |
| Size | 10-14 mm | 35-45 mm wingspan |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Nectar Feeders |
| Regions | Europe | Brazil, Peru, Colombia, Ecuador, Bolivia |
| Conservation | Near Threatened | Least Concern |
March Brown Mayfly
A spring-emerging mayfly with a brownish body and two tails, historically important to European fly fishing. Its flat nymphs cling to rocks in fast water.
Did You Know?
This species has declined significantly in many European rivers due to pollution and is now considered an indicator of water quality.
Neotropical Blue Hairstreak
A brilliant iridescent blue hairstreak butterfly with delicate tail streamers on the hind wings. Its underside is pale grey with fine dark lines.
Did You Know?
Its false head pattern on the hind wing tips, complete with fake antennae, tricks predators into attacking the wrong end.