Mountain Prosimulium vs Autumn Horse Fly
Side-by-side species comparison
| Attribute | Mountain Prosimulium | Autumn Horse Fly |
|---|---|---|
| Scientific Name | Prosimulium mixtum | Tabanus autumnalis |
| Order | Diptera | Diptera |
| Family | Simuliidae | Tabanidae |
| Size | 2-4 mm | 16-22 mm |
| Habitat | Mountains | Heathland |
| Diet | Omnivores | Blood Feeders |
| Regions | North America | Europe, North Africa, Western Asia |
| 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.
Autumn Horse Fly
A large greyish horse fly active in late summer and autumn. It has striking green-banded eyes and a persistent biting habit.
Did You Know?
It is one of the few horse fly species that remains active well into October.