Mountain Prosimulium vs Eastern Weighted Casemaker
Side-by-side species comparison
| Attribute | Mountain Prosimulium | Eastern Weighted Casemaker |
|---|---|---|
| Scientific Name | Prosimulium mixtum | Goera stylata |
| Order | Diptera | Trichoptera |
| Family | Simuliidae | Goeridae |
| Size | 2-4 mm | 8-12 mm |
| Habitat | Mountains | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Mountain Prosimulium
An early-season black fly of cold mountain streams in North America. Larvae develop in small headwater streams during late winter and early spring.
Did You Know?
Adults emerge so early in spring that they are often the first biting flies encountered by hikers each year.
Eastern Weighted Casemaker
A caddisfly of clean European streams that builds mineral cases with large lateral ballast stones. Larvae scrape algae from rock surfaces in moderate current.
Did You Know?
The lateral ballast stones are so precisely placed they appear to be glued on by hand.