SPECIES ID / Invertebrates

True Flies

Dixid Midges


  • 45 species in North America
Phylum: Arthropoda
Class: Insecta
Order: Diptera
Family: Dixidae

Identification Tips:

• Distinct head capsule
• Head is usually held tilted up
• 2 flattened lobes near end of abdomen with fringe of long hairs
• 3-25 mm

Life History:

• Found in quiet water with abundant vegetation
• Swim and climb in vegetation
• Larvae breathe air from openings at tip of abdomen
• Collect or filter feed on organic debris, algae and periphyton
• Pupate just above waterline in vertical case attached to vegetation or other object
• Adults do not bite humans

Very Sensitive Somewhat Sensitive Facultative Somewhat Tolerant Very Tolerant

Primary Information Source:
Voshell, J. Reese. 2002. A Guide to Common Freshwater Invertebrates of North America. McDonald and Woodward Publishing Company. Blacksburg, Virginia.