Glacier Black Fly vs Ozark Stiletto Fly
Side-by-side species comparison
| Attribute | Glacier Black Fly | Ozark Stiletto Fly |
|---|---|---|
| Scientific Name | Prosimulium alpestre | Thereva frontalis |
| Order | Diptera | Diptera |
| Family | Simuliidae | Therevidae |
| Size | 2-4 mm body length | 8-11 mm |
| Habitat | Mountains | Woodlands |
| Diet | Blood Feeders | Predators |
| Regions | Alps, Northern Europe | North America |
| Conservation | Least Concern | Least Concern |
Glacier Black Fly
A small black fly whose larvae develop in fast-flowing alpine streams. Adults are among the earliest insects active after snowmelt.
Did You Know?
Larvae anchor themselves to rocks in torrential currents using silk pads and tiny hooks.
Ozark Stiletto Fly
A medium-sized stiletto fly with a grayish body covered in fine pale hairs and clear wings. It is commonly found resting on sunlit surfaces in open woodlands.
Did You Know?
The larvae have a unique ability to move rapidly through loose sand using undulating body movements.