Trico Mayfly vs Mahogany Dun
Side-by-side species comparison
| Attribute | Trico Mayfly | Mahogany Dun |
|---|---|---|
| Scientific Name | Tricorythodes stygiatus | Isonychia harperi |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Leptohyphidae | Isonychiidae |
| Size | 3-6 mm | 13-17 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | North America | North America |
| Conservation | Least Concern | Least Concern |
Trico Mayfly
A tiny mayfly that forms enormous morning spinner falls over calm streams and rivers. Males have distinctive white bodies with black thoraxes.
Did You Know?
Trico spinner falls create such dense blankets of spent mayflies on the water surface that trout gorge themselves to satiation.
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.