Iron Blue Dun vs Mahogany Dun
Side-by-side species comparison
| Attribute | Iron Blue Dun | Mahogany Dun |
|---|---|---|
| Scientific Name | Baetis muticus | Isonychia harperi |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Baetidae | Isonychiidae |
| Size | 5-7 mm | 13-17 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
Iron Blue Dun
A small dark mayfly that hatches prolifically on cool overcast days. Nymphs are found clinging to stones in moderate to fast current.
Did You Know?
Hatches are most prolific during rain and cold snaps, making it a favorite species for wet-weather anglers.
Mahogany Dun
A large reddish-brown mayfly with impressive filter-feeding forelegs. Nymphs prefer moderate to fast riffles with clean gravel substrates.
Did You Know?
Adults hold their forelegs forward in flight, making them easy to identify on the wing.