- 165 species in North America
|Order:||Diptera (True flies)|
|Family:||Simulidae (Black flies)|
• Vase shaped body with circular attachment structure at base.
• Two brushy appendages protruding from head.
• 2 Fleshy prolegs on body just below head.
• Found only in flowing water (all current speeds)
• Attach to rock, wood or other submerged objects
• Filter feeders: collect drifting organic material from the current with brush-like appendages protruding from their heads. They periodically flick the brushes into their mouths to clean off accumulated food.
• Pupate in tent like structure attached to rocks
|Very Sensitive||Somewhat Sensitive||Facultative||Somewhat Tolerant||Very Tolerant|
|Pollution Indicator||High abundance is a reliable indicator of moderate organic pollution|
Primary Information Source:
Voshell, J. Reese. 2002. A Guide to Common Freshwater Invertebrates of North America. McDonald and Woodward Publishing Company. Blacksburg, Virginia.