Brushleg Mayfly vs Spiny Crawler Mayfly
Side-by-side species comparison
| Attribute | Brushleg Mayfly | Spiny Crawler Mayfly |
|---|---|---|
| Scientific Name | Isonychia bicolor | Ephemerella subvaria |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Isonychiidae | Ephemerellidae |
| Size | 12-18 mm | 8-12 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Detritivores |
| Regions | North America | North America |
| Conservation | Least Concern | Least Concern |
Brushleg Mayfly
A large, fast-swimming mayfly with forelegs fringed with bristles for filter feeding. Nymphs inhabit swift riffles of large streams and rivers.
Did You Know?
Unlike most mayflies, nymphs crawl out of water onto rocks to emerge as adults rather than hatching at the surface.
Spiny Crawler Mayfly
A mayfly important to fly anglers and known as the Hendrickson in fishing culture.
Did You Know?
Its springtime hatch is one of the most anticipated events in fly fishing.