Sulphur Mayfly vs Cascade Ice Crawler
Side-by-side species comparison
| Attribute | Sulphur Mayfly | Cascade Ice Crawler |
|---|---|---|
| Scientific Name | Ephemerella dorothea | Grylloblatta chirurgica |
| Order | Ephemeroptera | Grylloblattodea |
| Family | Ephemerellidae | Grylloblattidae |
| Size | 6-9 mm | 15-25 mm |
| Habitat | Rivers & Streams | Caves |
| Diet | Omnivores | Omnivores |
| Regions | North America | North America |
| Conservation | Least Concern | Vulnerable |
Sulphur Mayfly
A small pale yellow mayfly that produces reliable evening hatches on eastern North American streams. One of the most important species for fly anglers.
Did You Know?
Sulphur mayfly hatches are so predictable in timing that experienced anglers can arrive at the stream within minutes of the first emergence.
Cascade Ice Crawler
A North American ice crawler found in the Cascade Range of Washington and Oregon. It lives in volcanic talus slopes near permanent snowfields.
Did You Know?
Their preferred body temperature is around 1°C, making them among the most cold-adapted insects on Earth.