Black-Tailed Deer Fly vs Northern Black Fly
Side-by-side species comparison
| Attribute | Black-Tailed Deer Fly | Northern Black Fly |
|---|---|---|
| Scientific Name | Chrysops niger | Simulium venustum |
| Order | Diptera | Diptera |
| Family | Tabanidae | Simuliidae |
| Size | 7-10 mm | 2-4 mm |
| Habitat | Wetlands | Forests |
| Diet | Blood Feeders | Omnivores |
| Regions | Northeastern United States and southeastern Canada | North America |
| Conservation | Least Concern | Least Concern |
Black-Tailed Deer Fly
A small dark deer fly with mostly blackened wings and green iridescent eyes. It is an aggressive daytime biter commonly encountered near wooded wetlands.
Did You Know?
It is most active during overcast humid days and tends to bite repeatedly if swatted away without being killed.
Northern Black Fly
A common biting black fly of northern forests and boreal streams. Larvae form dense colonies on submerged rocks in cold flowing water.
Did You Know?
Females can detect carbon dioxide exhaled by hosts from over 20 meters away.